They are top notch and a great value. I have been using one on my AR for over a year now. It has even experienced a serious fall to a hard surface. Still working fine and clear as ever.
On mine the 1X actually apeared to be a little less and I needed to dial to about 1.2x for true 1x view. However, someone here posted that adjusting the eyepiece out one turn will fix this, and it seems to work. Reticle is still sharp (maybe sharper than before the adjustment). Glass is good, illumination is good, adjustments are precise, price is great, weight is a little more than some.
Do a search for DMS in the optics forum back about 6 months or so. I know we discussed this and a few others quite a bit on a couple threads.
B