Installed Weathertech window deflectors

Ordered the complete set as soon as the rears were made available, but only just installed them..

What a huge difference in wind noise at low speeds! The car is noticably quieter below 80kph.. Now the tradeoff is that above 80kph, it seems a bit noiser, but then you've also got more road noise and engine noise at higher speeds.. Plus you've got the benefit of being able to crack open the windows when it's raining to get ventilation vs. running the defogger/AC and killing your mileage..

One caveat for those who are considering these: the installation instructions are wrong- they tell you to open the front windows partway- I tried that and promptly snapped a sliver of plastic out of the front retaining lip while trying to install (the lip will not go into the channel if the glass is partially in the track- it's a very snug fit). In fact, the front window has to be down far enough that the glass is entirely out of the track at the front of the door, which on the Prius C, is at least 3/4 of the way down.. I also don't know whether the material really is acrylic as claimed on the website or some other polymer as I tried gluing the sliver back in, and nothing I had, including special superglues with primer treatments to solvent welding solutions, would stick or even affect the plastic, which should not have been the case if it were simple acrylic.. Anyways, as it turned out, the broken sliver was not a big deal and the deflector still went in and stayed secure, and the windows still went up/down smoothly, but just a warning to others: open the window all the way before installing.