BMR has a large, generally-friendly community. You'll get your chatterboxes and your lurkers. People who'll talk to you and people who'll ignore you. People who are polite, and people who are...less-so.
As a website, it's pretty stable, and the functionality is good enough. It's robust and easy enough to navigate and organise.
But in the end, it's like any other forum: you'll get out of it what you put into it. Effort will be rewarded, but you'll need to take the misses with the hits.