I have a 508T (V1) mounted on a GEN 5 Glock 19 MOS using a C&H Precision Weapons adapter plate (V3). I only have 600 rounds fired, but so far everything has remained tight and zero maintained. I went from a RMR Type 2 to the 508T for the Holosun circle dot reticle. I had significant visual distortion with the RMR Type 1 and Type 2 dot (and every other dot for that matter). The circle dot reticle on the Holosun is a clear image for some reason. I found the auto brightness mode on the Holosun to not really work for me. Usually too dim or too bright depending on light conditions. I have it set to manual brightness. I have not noticed any lag time on the auto off feature. A couple of other points. The first 508T I received was dead on arrival. It was replaced with no hassle. There is a 508T V2 that was announced at Shot Show. Biggest difference is side battery load vs bottom. I preordered the 509T a month ago and within the last week it went from shipping in days to shipping in months. I’m guessing the same will hold true for the 508T V2. I suspect that due to virus related supply chain issues, we won’t see these products for a while. Also, we may see existing stock dwindle as supply lags. I picked up an additional 508T V1 in the meantime. BTW, this is a non-duty use setup. Hope this helps a bit.
Also, C&H has a V4 adapter plate that is supposed to drop in April.