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 so we have hit them on expected reliability.
We would buy this one for just being a great treadmill. The high max incline is a bonus. Some fit and finish issues from the past were problematic. We have seen these as low as in the $3500 to $4000 range and at that price, they are a great deal. You would think that Icon would bring in someone to design a machine from a clean sheet of paper and not let any of their home engineers work on the machine but this doesn't seem to be the case.