Recommended? yes....but... viper red dot after about 1,000 rounds - Vortex Viper 1x24mm Reflex Red Dot Sight

I have this dot on an M&P core. It installed easy and initially I loved it. But in the last week the dot has started to drift up after zero in and only 10 - 15 rounds fired. The result of course is that my point of impact is quite low. I need to do a few more rounds of adjustment and testing before I call in the pros at Vortex, and I am comforted by the warranty that I know will make this right. I just might have to shoot Production while I'm waiting.