No it's a lot of money when you think about just getting hits. I would pay it to have a guy examine my serve and give me advice for 1 session. I took lessons as a kid for years at sanlando and really learned more just playing 6 hours a day and learning by repitition.
Just dropped my Agassi Donnay off to Frank. His reaction was great..he loved it. He said that Agassi still used a PJ version of it even when he retired and was with Head.