I have one and it appears to have good adjustments and holds zero well. It has been bouncing in my truck on a .223 Kimber Montana off and on for a little over a year and is still zeroed.
The eye relief is very short and in my opinion to short for anything with much more recoil than the .223 or maybe a light bullet in a .243. At 10x the image is so poor on the one I have I consider it a 2.5-8x, others may be better.
For what I paid for it I am satisfied with it even though it has the shortcomings I mentioned.
