Never thought I'd buy a Buick, but after testing the Rainier vs. the Envoy, Pathfinder, 4Runner and looking at everything else it comes out on top. Smooth, quiet, excellent mix of features, and the V8 gets unexpectedly decent mileage (15.8 city, and 22 highway). It has been perfect, no issues since day one, hope it stays that way. On top of all the pluses, the GM rebates made a great deal, over $9000 off MSRP.
Quiet, smooth, quick.
The front seat backs could be better shaped and softer. Add HID headlights.