I have one.
I hate it.
The first problem is that the thumb safety is incorrectly placed. It is not possible for me to shoot the gun as if it were a 1911. Shooting the gun with my thumb on the safety results in stress on the joint from recoil. Furthermore, the safety's "ledge" is quite small and is easy to miss. Mine started out tight but has loosened up during the deactivation movement with no drop in weight. It is sort of "squishy" now. I dislike having to change techniques just to accommodate one gun. The thumb safety on the P226 and P229 Legion SAO is superior.
The second problem with the gun is that the safety does not lock the slide into position. Initially, I liked this feature as a to load and unload the gun with the safety engaged. However, this becomes a problem when inserting the gun into a holster. The slide will move back slightly, taking the gun out of battery. The good news is that placing your thumb on the back of the slide while holstering prevents this. Even then, it's not much of an issue since, if the holster is tight enough to take it out of battery, the friction of the draw will bring it back. But, I prefer to proactively avoid problems while carrying a defensive firearm.