I have Aebersold, Snidero, and Vol. I of Fishman. Based on those, I ordered Vol. II of Fishman's, far more enjoyable and life-like to play along with those, and they are really well thought out, too. Not that Snidero isn't, but I think his were done for an Alto, and I play tenor, and something about them in the tenor book is not quite as good as Fishman's. My 2 cents worth.