Things I liked: Well made, all aluminum construction. Very easy to mount onto the dove tail.
Things I would have changed: Make a unit that will fit larger dove tails.
What others should know: I bought this to mount a peep sight on my Beeman Dual Caliber air rifle but it was too small for the dove tail. However, it did fit the dove tail on the steel breech I installed on my Crosman 1322, so I kept it.
Things I liked: This riser along with the front one I got did just what I wanted it to. It got the sights in my 10 meter rifle higher so that I could keep my head straight and not have to bend it down to be aligned with the sights. Also, the BKL products clamp on to the dove tail very well as both sides of the riser, or scope mount, snug in on the dove tail at the same time and at the same rate.
Things I would have changed: Less money. It's just a piece of plastic. Fairly well machined at that, but still...
What others should know: Nothing