Wow! Four pages of replies in a 24 hour period, mostly favorable. Add me to that list. I purchased my J-frame (a 637) eight - nine years ago with dealer installed LG-305 Crimson Trace grips. I was so pleased that I bought a set for my T-series Browning Hi Power a year later. Five years ago, when I bought my 686+, I installed them on it as well. In short, I would not buy a handgun that Crimson Trace did not make a set for -- that is how sold I am.
Many are turned off because they first attempt to use laser sights at the range, and are humiliated by the way the laser dot herky-jerks all over the place. That is NOT the place to start. Do it at home, dry firing at door knobs, light bulbs, whatever -- come to grips with the problem in private. Then, and only then, go to the range.
As for the laser giving your location away in a self/home defense situation, activating the laser should be the last thing you do before pulling the trigger. If you believe you can scare your opponent away by flashing him with the laser sight (or worse yet, blinding him with it!), you might as well give the gun to him. You sure aren't prepared to use it.
Cordially, Jack