I had a 2012 Prius V that had built-in Nav. I tried to use it once, and it was so frigging confusing and took so long that I just swore it off. There was nothing intuitive about it. I ended up buying an iPad Mini 3 because it fit perfectly in the console area under the shift knob. I used that driving for Uber and Lyft for hundreds of trips. What a godsend it was. And Google Maps is designed amazingly well, too. (Execution has some problems, like when it sends you to an empty lot...) I set up the radio, and it wasn't as straightforward as I imagined it would be. After a couple of months, I got a Sirius XM account and boy did that take some fiddling to get stations set up. I cancelled it after 6 months for a variety of reasons. A couple weeks ago, I traded this vehicle in on a new 2017 Prius Prime, mid-level version. It has the fancy 11" screen that's hard to read because it picks up reflections from the right side of the car. It needs to be tilted towards the driver. I literally cannot read it while driving home at all because of glare. I have to hold my hand over it to shade it in order to read it. MAPPING The dealer guys said it's got Google Maps installed for the Nav function, so I tried to set up a trip. Ugh. The UI is designed like an old Garmin GPS I used to have. It sucked. "Enter State", "Enter City", "Enter Address" ... blah blah blah. Wth? This isn't Google Maps! It's a crappy 10-yo $50 GPS device with a big screen! I can pick up my phone, say "OK Google", then say "Flo's Promenade" and it brings up Maps with the location highlighted. I press a button to get a route, then press once more if I want to have it give me audible driving instructions. That's ONE voice command and ONE button press. THIS is how you need the Nav function in a VEHICLE to work. But my $30,000 car with so-called "advance mapping and routing" requires so much attention and button presses that if I want to use it, I need to pull over and spend a couple of minutes looking up the actual address for Flo's on my phone BEFORE I can enter it into this "advanced mapping and routing" thingamajig. I will NEVER USE IT AGAIN! It's CRAP! AUDIO I filled up a tiny 32GB USB drive with 75 or so of my favorite music albums and plugged it into my Prius V. The design of the audio system wasn't very friendly using this storage device, but it worked ok. I had to go in and change the filenames to get it to display things in the correct order, but once I did that, it wasn't too bad. So I plugged the same thumb drive into my $30,000 Prius Prime with it's sooper-dooper fancy-schmancy Entune Audio System, and it's HORRIBLE! Who in the hell designs this crap??? Again, the UI design is so unintuitive and convoluted that it's nearly impossible to use while you're driving. I'm not sure if they designed it this way simply to discourage people from using it, or if they seriously thought it's a great design. IT SUCKS!!! AUDIO FROM USB I hit "USB" and then it starts playing. If I'm lucky, it starts where it left off, but not always. There's a big chunk of the screen that displays audio settings, and for most of that space, touching it does absolutely nothing. There are settings you cannot set, toggles you cannot toggle, things you cannot activate ... simply by touching the screen. Nosiree, you have to bring up another screen, which I haven't found yet, to change ANY of the audio settings. You'd think that making a display that looks similar to a radio would suggest it WORKS like a radio. NOPE! It's a half-assed design that somebody never quite finished, and a manager somewhere said, "Well, time's up, Fred! We need to ship it NOW!" And here's what we've got ... this thing that seems like it was designed by a 5th grader, with no sense of what someone driving a car might want to see, or how to do anything easily or quickly. I thought, "Hmmm, let's pull up 'Dark Side of the Moon'". First, you have to hit a ">" right-arrow a few times and tell it you want an Album. Then it gives you some letter ranges for the first letter -- 'D' in this case. So you select 'D' and there's a list of albums starting with the letter 'D'. Press the album name, and it shows you a list of the songs on the album and starts playing the first one. Oh, wait. That's not the beginning of the album?! Where's the first cut? ... Oh, my ... the songs are sorted alphabetically! I press one and it starts to play it, and changes the display to show a bunch of stuff, including the song name. Oops, that's not it. Let me go back to the album listing. Hit the back button and ... it asks you to select an ALBUM again! Wth? Let's hit the back button and go back to the song that's playing ... and ... it closes the entire audio section! But the same song is playing. This is reminding me of the Nav function that says, "Enter State", "Enter City", "Enter Address" and if you want to change the address from 1234 W Main St to 1234 E Main St (or 1235 W Main St), you have to go back to "Enter State" and start all over. Seriously? Select Album, select D, Select Dark ..., ahh, there's the album list again. Song ends, jumps to another song. Wait, that's not the song that it should play next either! Nor was it the next in alphabetical order! Oh, COME ON!!! Do the people who designed this player have any clue what an "album" is? It's a collection of songs that are designed to be played in a specific order, NOT ALPHABETICALLY!!! Where's the "order by" button? Buehler? Anybody? Maybe it's on that hidden setup page that I can't figure out how to access. But there seems to be no (obvious) was to get from the currently playing song display back to the list of songs on the album. There's only a "Browse" button that takes you back to SELECT ALBUM. I bet they charged me several thousand dollars for this PIECE OF CRAP NAV AND SOUND SOFTWARE. I'd send it back and demand a refund if I could. CONCLUSION Sadly, we customers are STUCK WITH THIS HORRIBLY CRAPPY SOFTWARE until the car dies, because even though there's a computer running it all, there's no way to change any of it. This is a 2017 model year Prius, and the electronics is actually WORSE than what was in my 2012 model year Prius. Did anybody at Toyota ever think of spending a few minutes talking to customers and getting design feedback on their software? Given that the overall design quality has gotten WORSE over the past 5 years, I can't see how they would have. I seriously feel like gluing my iPad Mini 3 over the top half of this useless display -- on top of a wedge that tilts it to face me rather than the mythical viewer sitting on the middle console who's not even the driver. It runs Google Maps flawlessly, responds to my voice requests, and it has Apple's maps and any other mapping function I want to load in. And while I generally dislike iTunes, at least they know what an ALBUM is and how to organize the songs and play them in the correct order. And it doesn't try to simulate a 20-yo car radio with lights that you can't touch to change. Come to think of it, I don't even recall seeing an audio input jack anywhere. Did they take that away, too?