I've got several pistols with the fiber optics, but the one I've shot the most is the Ruger MKIII hunter. It's got orange, green inserts.they are all good in the right place with the right light. But what ever is in there is usually less than optimum when I am using it. I also don't like the sights profile, but that is just my preference.
To make a long story short, fiber optic sites would not be a plus factor when I'm buying a gun.