I guess a good release would be pretty relative.
If you have a quick trigger then a slow yet stimulating technique would suffice. If you can last forever you are gonna need some serious skills and possibly endurance on her part.
For me, I tend to last a long time, so, if an mpa is so good that I actually don't have to focus and can intentionally hold back that can be the best release. Usually the longer you can hold back, the more intense the release.
There was this one mpa, and I've told this story before, but I like it. I couldn't last more than a minute. It was insane. I tried everything, short of desensitizing cream, but I just couldn't last with her. I really couldn't figure out why as she barely talked and mileage was low, but there was just something about her overall "massage" that rabidly turned me on. She always wore a skirt and would slowly slide her knees/legs down my back till her crotch met with my back/butt. I'd have to say that this was also a good release though.
Then of course there's the AP during release, but that's another level and not for the homophobicly inclined.