In reply to KennyG:
I'm in very much the same boat - except I went to see John Kettle in the lakes a couple of weekends ago.
Hmmm...
When I started out, I was working nights and got the book (and DVD) "the self coached climber" and was going to the local wall during the day several times a week and working on what I'd learned in the book - the dvd gives demo's of the various exercises. It was working well but then I had a while not climbing and now getting back into it.
John's a good coach, known name, easy to get on with and knows his stuff. I paid just shy of £150 for four hours and have seen a marked improvement already so I certainly rate the whole idea of seeing a coach and I'll most likely be back for more.
However, on the day I had a hard time focusing on what I was doing so it's not really all sunk in as well as it could have. I'll persevere for now and john's offered to talk any issues over with me if I need to so no problems there really.
In my opinion, having tried both, I think you'd do well to get the book and really put the hours in with what's in there before you pay for a coach - you may find it gets you to a level you're happy with for considerably less beer tokens.