In reply to jamesclimbing:
If your limiting factor at the moment is upper body strength or finger strength (that sort of thing), using a fingerboard frequently should improve your climbing to the point that strength is no longer an issue. Just make sure you warm up and cool down after each session, I learned that the hard way. The other good thing with the Beastmakers is that they have slopers on the top and they really help your ability to grip on slopers outdoors!
Just don't over do it!!
There's loads of threads around if you have a search with people reviewing how fingerboards have helped their climbing.
Dave