I have one of the earlier PA red dots and though the battery life is not as good, I change the battery every year and it runs as good as the day I got it. Once zeroed, it holds zero and works as well as my Aimpoint CompM4 and I like it better than my Vortex Sparc. It has been a few years, but I believe it cost me $60 or $70 for it with a mount. I haven't had to use the customer service at PA, but I have used Vortex and had nothing but excellent service.