I've used them for several years. My favorite light to use. Mine are all around 5 years old and haven't had a single issue. I've never had one come off a tip-up so I can't tell you whether or not the floating and waterproof claims are true, but the amount of slush and snow mine have seen has never caused a problem. If you are near the Eau Claire, WI area, Scheel's in the mall has carried them in the past. I haven't been in there this year, but I bought one there last year for my fiancee's tip-up.