 We owned a Yukon and considered the Escalade and LX450 when we bought the QX56. While the overall vehicle has been very good, and the ride also very good, it still has some jitters and noise on the highway that were not experienced in the other vehicles. Most of the time, the QX56 has felt very smooth on the road and has been extremely comfortable on long hauls to Mammoth. Comfort is great, but at times the ride and feel on the freeway can feel a bit jittery and truck-like inferior to the ride we experienced with the Yukon,or the other cars we drove. Roomy all around. Great 2nd row - limo- like room. Same height and width, but the extra 8" length over the Yukon are surprisingly noticeable.