The RMR may certainly be durable, but in my experience with 2 different slide mounted adjustable LED units, not always reliable. Both me and a buddy's RMRs had disappearing dot issues within the first 500 rounds we had them. The jury is obviously still out on the DP pro but my personal testing so far shows it to be far more reliable than the two RMRs I've had personal experience with. I don't plan on testing the durability thing myself, but it certainly SEEMS to be built just as if not slightly more robust than an RMR. Of course, I can't tell you the last time I dropped my pistol, or ran the top of the slide into something, so I doubt I'll ever really have to worry about it anyway.
Nope no auto setting. I was a little disappointed by that, but I don't know how useful it would be for a concealed carry pistol anyway. My RMR had an auto setting, which turned the dot ALL the way down when concealed under clothing. Shooting outdoors in bright sunlight, I quickly learned that I was faster than the auto setting, and so didn't have a dot for at least my first shot while it was still "adjusting." After that day I just decided to find a compromise setting and run with it.