I bought a Holosun 503C about 3 or 4 months ago. I love the glass and the reticle. I got this site for $149 on Ebay. I think the site is a $239 site. I just got one a lot cheaper. Anyone know if these sights hold up? Also is it a site you would bet your life on in a home defense scenario? There's only one thing I don't like about it. If you are aiming the rifle in a dark room and the site is in automatic mode and if you have to shoot at a lighted room, the reticle is hard to see. It has a lot of stellar options for a nearly $250 red dot site. It has the option of using a circle dot or just a dot.