In my limited experience, you're probably at it.
Not to say that no one does good critique at other sites, but here they're nearly all good in terms of making the writing better, sticking to the writing and not the author, and not rewriting it the way the critic would have written it if it were their story. No other site seems to strive for that.
Of course, if you do quite a few critiques you'll get more critiques, and there are many people here who have one or more behind-the-scenes critique partners.