I had one on my Marlin 1895G for a while. It worked nicely, but sort of fouled-up the carrying qualities, IMO. Couldn't just grab it at the balance point and go anymore.
I switched to a Williams "Foolproof" receiver sight and one of their "Firesight" fronts. Just as fast to acquire a good sight picture with, and groups a bit better out at 100 yds, at least for me.