A full commercial drive system packaged with the rear drive makes it exceptional. The high incline is a bonus. They had some glitches out of the box last year so we have hit them on expected reliability...the fixes should correct all those problems but we were bit once.
We would buy this one for just being a great treadmill. The high max incline is a bonus. Some fit and finish issues from last year were problematic as was the pulley design we pointed out to the engineers (and they promised it would be fixed- it wasn't but now it is).