Well, I finally took my 3.5-month-old Prius on a nice long trip into the Sierras for a backpacking trip with some friends, and figured I'd write up some impressions, especially considering that many people here don't have many opportunities to drive in the mountains or on rough roads. Overall, I got a somewhat disappointing but not awful 46.3 mpg (calculated) on the 500+ mile trip; a bit below my typical 50 mpg on the other 1000 miles the car has, but I suppose to be expected given the huge amount of mountainous terrain and large weight of occupants and gear (roughly 800 pounds, I estimate). I also spent lots of time at 3000-4500 RPM while going up mountains, at speeds both low (20) and high (50), which I'm sure was a leading contributor to my poor gas mileage. The trip involved driving from about sea level up to about 8000 feet (Sequoia National Park), then down to 1200 feet and back up to 7600 feet, the latter portion on a 1-to-2-lane road with occasional sand/gravel stretches, and plenty of washboard and potholed surfaces. The large elevation changes (especially from 8000 feet down, which was on a well-maintained road) meant that I had to use B mode quite a bit, which was an interesting experience. However, I noted on the less-maintained road that B seemed to do very little, other than burn gas; my ScanGauge indicated the engine wasn't going over about 1500 RPM most of the time, and I felt very little engine braking. My presumption is that B does not apply much drag at the speed I was traveling; about 15-25 mph, due to the steep slope, sharp blind curves, and the narrow and poorly-maintained road. Having more drag from B would have been nice, even if it only kicked in when I pressed the brake pedal. However, there was a little bit of rolling, and some acceleration needed after some of the curves, so I managed to avoid completely filling the battery most of the time, despite the 6400 foot drop (over about 23 miles). I also didn't feel too bad about blasting the A/C on max on this part of the trip, since there was an excess of energy available from regen, and a lack of battery capacity to fill. It does seem to me (and I think this has probably been noted elsewhere, though I don't recall for sure) that B will cause the Prius to use more fuel, as it doesn't turn off the engine nearly as readily. Because of this, I switched back and forth between B and D fairly frequently in a few areas, so that I could stealth down gentle slopes, while getting extra braking on the longer, steeper descents when the battery was nearly full. Traction, steering, and braking all performed well; some of the travel was on very steep sand and gravel, or rough surfaces, or braking quickly when another car came around a blind corner on the narrow road. I did not notice any dropouts in braking as reported by others, despite a good 23 miles of nearly-continuous braking at low speeds over a variety of slippery and rough surfaces, though I wasn't exactly trying to cause one, as doing so might've landed me off the edge of a rather large cliff. The Nav system did OK; it differs somewhat in route choice from Google, and definitely thought that some roads were a lot slower than they really were when calculating the ETA. I was a little disappointed that I only encountered traffic in areas where there were no possible detours, but I suppose that's why the traffic was so heavy in those locations anyway. I'm still not entirely used to how to do everything on the Nav system, but I'm getting better. I feel like the interface could use some simplification, even if it meant losing a feature or two. Thankfully, there were no tests of the PCS or airbags, nor did the resident marmots of the area eat my radiator cables or electric wiring, as they are known to do in the particular area of the park I visited. Next weekend's assignment: a car wash, so she returns to her natural Blue Ribbon Metallic color from the current approximation of Sandy Beach.