I installed Firesights on my Marlin 1895 and then on my Henry .22. I bought the Henry because it is almost the same size and feel as the Marlin and is cheaper to practice with. Then, I got a 92 with a peep mounted on the receiver. I liked it, but installed a Firesight on the front. Then, I went to a Firesight rear sight as well. 3 coloured dots to line up. I've also got the same setup on my 12 gauge lever gun and my Ranch hand.
Now, that being said, I think the nicest quick sight I've ever seen on a gun is the battue sight on my son's Tikka. That is almost like pointing a shotgun!