A TV tread for $1100 gives you a big clue that they left out a bunch of the stuff that makes a good treadmill. We would expect somewhat average performance from it overall with some kinks creating headaches. Once you get to this price point, you really have to cut corners to get big features in the package.
It is a great looking fella but if you need a treadmill, forget about the TV and focus on getting a good solid, quality treadmill first. If you do that, you will pick something other than the 475MX.