Rotated in Denver last year and absolutley loved it (they didn't love me as much I guess, oh well). Can't imagine that you can get much better training anywhere else. The senior residents there are resposible for the whole DG ED and act like attendings. There are attendings sitting at the nursing desks if needed but it seems they do more teaching than managing the ED. The residents teach the students, interns, paramedics, nursing students, etc.. on a daily basis in mini-lectures so it's great academic training. Plus on off days the residents took me rock climbing, climbing 14ers, and mountain biking. The senior residents there are by far the most prepared I've worked with (med-school, another away rotation, and current residency).
The residents do work hard but I think the education is great.
BTW I know of several people who matched who didn't rotate in Denver. Congrats on the interviews.