I had the TPU-X since they came out and I love them, very comfortable. The only concern that I have with it is that the TPU material on the non slide shoe is very soft, so it wears out super fast if you drag your toe, which I do. This also caused the bottom of this shoe to catch on the front so now it flaps a little and catches the approach when I drag. Other than that, these shoes are very comfortable and right up there with the 3G Tour Ultras.
The new colors are so tempting, I like the white/black ones!!!