I Completed the four day course with Dave a few days ago, which was one to one. After being on a course several years ago run by a large and well known training company, which had a large number attendees and was hard to learn as a vast level of abilities on the course, Dave is right when he says on his website, that one to one is the best way to learn. I wish i,d saved my cash and done my initial training with Dave. Dave is very knowledgeable and is more than happy to share his secrets with you and his tools he makes his self are superb and work much better than mass manufactured ones, which makes life so much easier, and he makes you some to takeaway for free!
Would recommend the course and Dave to anyone, and if he lived closer I would not hesitate in popping in and picking his brains for new tricks.