I have one now and enjoy it very much. I haven't shot IDPA in quite a while so I can't speak from actual IDPA experience with the SSR. However, I have shot with a stock 686 in the past. If I were shooting now, there is no doubt I'd take the SSR with me.
Mine has a great trigger, balances well, and the interchangeable front sight system is just the best. Mine is sporting a .250 height green Hi-Viz right now. I also have a McGivern gold bead, a plain Patridge and the stock red ramp for different purposes. It is also wearing Miculek grips now. The factory Altamonts are nice but just too pretty to carry.
Mine has become my favorite revolver for self-defense or work. That is over two PC-686 Carry Comps, a PC tuned 686, and a PC-646.