I enjoyed it quite a lot, though I imagine a part of the enjoyment just comes from having the show return. I'm not a huge fan of it but it's still a favourite. Was watching best bits of last 3 series on YouTube last night, and while this episode didn't contain any moments of genius, it was on par with the show's past record.
I sometimes think The Big Bang Theory can be too geeky and IT Crowd not enough. Still, I don't grudge either since they're both really hilarious.