Looking to purchase a decent quality micro red dot sight. Anyone have any experience with them? Hoping to start out with something <100. I realize at that price point I'll not be getting a last forever sight. Curious to see how one will hold zero. Just want one to put on my 9mm pistol and frack around with it to see if a more expensive one is in order. Have read many reviews on amazon and midway but don't really trust a lot of those reviews.