It's hearsay, but a friend of mine who was there last year told me a pretty frightening story about how one of their engineers harassed and stalked my friend's co-worker for the duration of the conference. (word to the wise, women should never put their cell phone number on the business cards they hand out at conference filled with drunk, horny nerds)
I've been using them for a couple of years on small- to mid- sized projects and am very happy. My needs aren't elastic at all, though.