I have been to a few. In Birmingham (been twice) we all stayed and went out together, in London we just met during the day and chatted, and in Newcastle went out and had a great time. Each time it was great to meet new friends and we all have something in common and each time i have come home inspired. There's one planned for Bath about eastertime. Keep looking in the section on meetings
Definately worth going. I have met some wonderful friends.