Hi Anniebear, in my experience, it seems to be the first service that you are referred to when there is a behaviour issue.
My ds and I went there when he was about 3 but generally they seemed to want to only speak to me. I went once every week, taking time off work unpaid. There was 2 people who asked many questions about my ds' behaviour and my reaction to it etc. When I asked for constructive advice for example when he was headbutting the floor in a shopping centre, they said things like "you cope so well" etc etc.
One day I took my ds with me and he played happily (v unusual - made me look like a complete liar) with the sandpit. A few weeks later I took him with me again and we were ushered into another room with no toys - and no sandpit. He had a major meltdown and went wild, trying to rip the door off its hinges. I stayed in my chair and watched their reaction and they shouted to me "do something". I said "no, that's your job - you tell me what to do". I pointed out after he'd calmed down that this was the usual behaviour and I had come for help on how best to deal with it and as I hadn't received it would not attend again.
I received a questionnaire about the services and I gave them what for.
I hope your experiences are better than mine Anniebear, there must be some good ones out there. I went thinking that I would get guidance and advice and got nothing like that. It was a waste of time and money for me to have what effectively turned out to be "counsellors" listen to me going on each week.
It may be a good idea to see what they are meant to offer as a service before attending, that way you won't have any problems like I did. That probably doesn't help alot - I just hope your services are better than mine.