I have a Crimson Trace trigger guard laser on my Kahr PM9 and have been very happy with it. I had to modify my Desantis Nemasis holster due to the new profile but it was relatively simple to do. I noticed that the mounting screws are beginning rusting and I called Crimson Trace to order a new set. The representative was very professional and courteous. Since all of my screws are rusting, they asked me to send in the laser to they can replace them for me. I went on their website and I found out that they are offering batteries for life! If anyone owns a Crimson Trace laser, be sure to register your product and take advantage of this great offer.
Crimson Trace = Great Product, Great Service, Great Promotion!