Great value - Mueller Optical 1x22x 33mm Quick Shot Waterproof Red Dot Scope

Bought a "refurbished" one off of eBay for $50 and after using it for a couple years would gladly pay $100 for another.
The 3MOA dot is great for accuracy-focused shooting. After a couple thousand rounds on my AR-15 it's still perfectly on the POI at <100yds. Haven't had to adjust anything since the first zero. Recommend zero with the 3MOA dot.
The 5MOA dot is good for new shooters, and the other two are just fun. I'll often switch to the "Halo" reticle when dumping mags for a bit of nostalgia. Not as accurate to POI as the dots, but always fun.
The auto-brightness also works pretty well for me. In daylight its a hair on the dim side and at night a hair on the bright side, but always easily visible and never reaches a point of producing lens flare.
If you turn up the brightness manually it will start to show lens flare around 7-8, though I haven't needed to use the manual settings for a while.
Doesn't feel flimsy and tactile response is good. The reticle knob has a bit of wiggle room but I've convinced myself it doesn't affect the image. A solid snap into place would be nice but this isn't bad. Used in rain and shine with no issues.
Overall quite happy with this one.