A very solid treadmill if you have need for a light institutional model. This one makes an interesting choice if you need a moderately priced machine but don't have $3k to pony up for a True but we would also look at Icon and Yowza in this range.
With the TT8, you get as solid a unit as Sole makes. Although this treadmill is not a folding treadmill (and that's what Sole is known for) the factory still did a great job on this machine. Some people might not want to buy the top end unit from a company that is known for making mid-market machines but that would not concern me personally. If this was a new model for Sole, we would be cautious but this one borrows many of the parts from the same factory's Spirit light commercial treadmill that has been proven in the field.