This is my fourth season on NTN (over 400 days), I have tried most of the boot offerings and have owned the Crispi EVO, Garmont Prophet, and now these TX Comps. By far this is my choice of the three top boots. The comp is slightly less stiff than the EVO, but does not lack in performance, and is significantly lighter and better suited to backcountry travel. Although it is lighter it gives up very little in the way of performance. They provided a good comfortable fit after proper thermo fitting, I did get some slight heel pinching that went away after a few days of skiing.
Next year Scarpa will add the powerblock tour to these boots making them even better. The powerblock tour switch will be available for retrofitting previous years in fall 2011. I have had no issue touring without the walk mode as long as the upper buckles are loosened.
The Garmont Prophet is a good performing boot, but softer and I had severe toe cramming issues with it due to the lack of a heel retention strap (4th buckle.) The heel is wide. As with all ski boots your fit may vary.
The Crispi EVO is the stiffest NTN boot and probably the best for on piste performance, but is heavy, stiff, and has a weak walk mode switch that gets loose with time and is prone to breaking. The shell does a poor job of keeping moisture out and the liner is slow to dry. With that said it was the most comfortable for my foot.
For top level performance and durability the TX comp is my first choice. If you have a more casual skiing style or enjoy meadow skipping you might want to look at softer flexing boots.