Pros .... wonderful battery life. I've found on average that the batteries run about 4 bucks a piece, but you get 3 years of battery life and that is with the Dot CONSTANTLY on. I will change mine out every year though, as recommended by others I know who own one of these, as a "just to be sure" type of thing. But I use my optic professionally. But even with changing the battery once a year though, that's 4 dollars per year for a constant on red dot.
Great quality. Feels very well built and solid. No sloppy machining marks or rough edges/ burs. The knob on the mount is very easy to tighten down snug by hand and mounts the Optic solid to the rifle. There is no slop or wiggle once it's tightened down. The added flip up lens covers are a nice plus.
This thing looks good as well.