I have them on my CZ 75, XD, LCR, & S&W 625. I shoot IDPA & USPSA & find the fiber optic easy to acquire rapidly. Haven't had any issues w/ the sights breaking/ cracking. I prefer the green over the red- for me it stands out much more and is easier to acquire.
Yes, I like them & recommend them.
Just to clarify, I only use a front FO sight & blacken the rear OEM sight. I find FO rear sights complicating a sight picture- too many bright dots....