Would you recommend joining a writers group?

We have several writers groups at Yarra Plenty, spread across our branches. Some have specific goals (like writing memoir) and others are for particular age groups - but the majority are for adults who are seeking fellowship, advice and feedback for their writing. I have been involved in a couple of groups which have been meeting for about 10 years and value the fellowship and encouragement I have found. Are you part of a writers group at present, if so what have been your experiences? If you are not a member of a writers group, what would make you consider joining one?