This is my 4th Escalade, one was an EXT, the others are the AWD models. They consistently have shown very good quality, reliability, and performance. It still rides a bit harsher than I would like, but it handles reasonably well. I have been sufficiently impressed with this vehicle to keep coming back to "the well." It's nice to drive something this nice that's built in this country, actually Arlington Texas.
Satellite radio is great, the powertrain is wonderful (which is how I got hung up on Escalades to start with). The Navigation system works well (it had to be replaced soon after purchase) as long as the destination is somewhere near civilization.
I don't understand why they won't put a telescoping steering wheel into this thing, they do have adjustable pedals. I also wish they had left the old wood steering wheel instead of the wood rimmed replacement. Would be nice if it had heated/cooled cup holders as well.