For the price, I'll rate it a 5 star item even though there a touch of edge distortion detectible with strong daylight.
It appears solidly constructed and the adjustments are easy to manipulate, at least at home when they're warm.
There are compensatory dots and lines for distance and windage plus an included chart in the manual referencing many common rifle cartridges including magnums.
The rifle for which it was ordered is still in shipment so I haven't mounted it yet.
The lifetime full coverage warranty is reassuring even though I hope to never need it.