I installed it, got some fatal error. I was going to look into it further/file a bug report when I had a bit more time. Right now, doesn't seem usable.

EDIT: As far installing games, you need to grab ROM dumps of the desired game (which, of course, you already own the game itself or have gotten permission to use it ) and load it in the application. Most MAME frontends allow you to pick there the ROMs are located, but it seems to be hard-coded to expect ROMs to be at /opt/sdlmame/roms [1]