The Avalanche is huge!! The most comfortable ride of almost any truck I've ever been in. Vision to the rear can be challenging depending on your seat position. The fuel economy is decent, I'm averaging about 15mpg combined with mostly city driving. On the highway, figure about a solid 20+mpg. The tranny is silky smooth and shifts without effort. The seats are VERY comfortable and supportive. The instruments, while dated are very functional and easy to read. Yes the plastic trim on the dash seems cheap, but actually very solid. My dash has a crack that I will repair/replace, this is very common for Chevy 2007-2013. I will actually just buy another dashboard (300.00 online from GM). The navagation system is also outdated but does the job just fine (it's dvd based). I bought the vehicle used with 150K on the speedo. Not one rattle at all. Still rides like new and the cabin is totally quiet with no road noise at all. I have updated all bulbs to led including the headlights and they work perfectly. I might upgrade the Nav system in the future, but there is no rush since the factory system performs so well. In total, I love the Avalanche. It has adequate power and can be found for a lot less money than newer designs like the Ram Hemi, and Ford EcoBoost.