I put a set of CT's on a Glock and love them. It will let you know real quick that your trigger control sucks at the range.
I feel they made me a better shooter. Mine work great in the range and in the woods. I would say you could see them in direct sun light for about 20 yards after that hard to use. But I have a small range I shoot at bowling pins and with the shade of the leaves in the middle of the day I can see my site fine.
Check around I found that Ebay :barf: of all places has the best prices. Places around here wanted $229 for G26 grip and saw them for $169 on the site.