I replaced the tom mounts on my Gretsch Renown kit (the pre-2013 model with the RIMS-style wrap around bands) with the ATLAS mounts and love, love, love them.
I also have a short ATLAS arm that I used to mount a ride cymbal off of my bass drum. I replaced one of the lugs with an ATLAS mount and bought the short arm and the 12.7mm post to mount it. It worked great. I went back to a 2-up instead of a 1-up tom setup, so I took that off and put the original bass drum lug back on, but it worked great in that position.
I want to get a long ATLAS arm and a couple of the scissor lift arms and use them to replace some cymbal stands but that's going to have to wait until after the tax return.