Never had one yet - but if you are pleased QK - I am pleased for you.
I am an unmitigated CT fan - despite money investment. 3 revo's have them now (Sp-101, M28-2 and M629-6) ... and of course Mr SIG has them too.
I have mine generally set up for 21 feet - and that gives enough ''spread'' such that from 10 feet or less right out to maybe 15 to 20 yards is OK.
I know one thing - with my old eyes and the SIG in less than bright light - I can get amazing hits using the dot - simply because no need to point and sight as per normal. Always reckon too - these devices could be real useful - shooting strong hand say - round a corner - keep self way better covered while still getting on target!!