I went a few years ago and it was really good well worth the money as your not putting your bike or kit in jeopardy...
Leon was there tutoring with a few other racers but most of the instructors are good ex club racers, Ron was giving pillion rides that were lapping faster than most people on track
they realy are in whole different league...
There were 3 x 15min sessions all following an instructor then for the last session he followed me. I got lots of advice and encouragement after each session. There are cones out for breaking, turning in and apex which makes learning the track really easy. At the end of the day just go as fast as your comfortable with and have fun
Oh and don't do what I did and bin it at Goddards on the last corner of the last lap