not a bad experience as such, but it didn't seem to have any effect on the colic, which is what we went to see them for in the first place...
I did feel we were easy money for them (1st time parents etc...)and they seem to want to see us quite a few times, whereas most mumsnetters will tell you you only need 1 or 2 sessions max.
It did seem to help with DS "funny shaped" head though (forceps delivery...)