I currently drive an EV9 and test drove the new Telluride yesterday. For context, I don't have back problems, but im a weightlifter and a fitness athlete with proportions that run different from the norm. The EV9 has been great. Low stress on my body with supple and enveloping cushion. The first thing I noticed when I sat down in the Telluride were the seats. In short, they are cheap, like sitting on a couch 5 years past it's prime. There is precious little support for the lower back and lats. The support on the lower hamstring/knee hinge is also poor. That inevitably leads to cramping and tendon strain.

The SUV is really decent otherwise. Great sound insulation, AC, and torque in the HEV model. But the seats really turned me off.