I bought a Crimson Trace for my wifes LCR, simply because she cant see the sights. She has cataracts, and cant have the surgery for 6 months or so. She was all over the place, shooting without the CT. She now is very accurate WITH the CT. That alone is worth the money for the CT. I have them on my carry guns. I recently was trying to decide on a new handgun purchase, one model had a CT available for it, the other didnt. I bought the gun that had the CT available, and have the grip installed now, even though the other gun held 5 more rounds.
One thing no one has mentioned yet... The CAT loves the Crimson Trace.