Four of us went and had a really great time at At Escape. We wanted a challenge and booked the Library Lockup (3.5/5 difficulty, according to the site).
The site actually recommends a team of six but our four were more than adequate. Then again, we consider ourselves smart cookies. Still, we were five seconds away from solving the final puzzle when the timer went off! Their leaderboard boasts some impressive stats on the folks who do manage to escape so we didn't feel too bad :)
Friendly staff, easy to find, interesting, multi-step puzzles my group worked really well to solve together. My ONLY complaint would be that one puzzle featured visual hints that we found absolutely impossible to find. We used up our one hint on it and still had trouble identifying what we'd been just told about. The staff acknowledged that that's a known issue so hopefully it gets fixed soon!
Either way, we'll totally be back in the future!