we joined recently, as far as I know we're the only ones in this parish.
They run some good courses but the produce mark was the biggest incentive for us personally. Their magazine is quite good, we were asked to write an article for the next edition about what we are doing on our croft.
The only negative we've found so far, and I mean it in the nicest possible way, is that while the staff are helpful, some of them are not that well informed about crofting matters so had conflicting advice or had to wait for them to get advice from those in the know.
They also offer a legal helpline (initial consultation free) which can come in handy
and as Hamish says, they are quite proactive on matters affecting crofters