Initial thoughts on this, will add more after some range time. Clearest Vortex red dot i have owned and i have astigmatism. Purchased to put on MCK or levtac 357 with picatinny, since i couldn't find a certain brand in stock. Only issue so far is auto shut off is 14hours! Who the heck needs this thing to stay on for 14hrs when it has "shake awake". Dropped the ball on that one Vortex.