I have a couple of pistols with RDS installed on them when I got them in trades. They work well, but I just haven't warmed up to the idea of an EDC or work pistol equipped with an RDS. Anything electronic is the first thing to go down when you need it. With my rifles equipped with RDS, I always have BUIS. IMHO, if you're running an RDS system on any firearm that you use to potentially defend your life, you are taking a huge risk by not having BUIS available in the event the RDS fails.