All I have is a ring sling, but it served me well with my first son. I have my fingers crossed that this guy will take to it just as well. Of course, if not, then I have an excuse to find something else. It doesn't work for my partner, size-wise, but we've decided to wait until our baby's here to go shopping for one that fits them both.
It would be much more fun to do some online browsing/shopping, but I'm working on getting ahead on some coursework right now.