Good strike bomber in competent hands...problem is there aren't too many competent hands in many other air forces. It's the equivalent of a F-15E, about as powerful, but about the same thought line. Wouldn't want to take it into an air to air engagement though.
Depends on the opponent. The latter model SU's are about as capable as the F-15, (although the F-15 hasn't got it's electronically steerable phased array radar yet (and this is not the first Russian/Soviet fighter to have one, the Mig-31, more of an interceptor really, had one was back in the 1970s and '80s.