They are all pretty weak as far as pinball machines go. Legends of Vahalla is average at best and I'm being generous in saying that....played about a dozen games of it this weekend at Pintastic New England. Hot Wheels is ok and has the best flow of the four.....Ocktoberfest is poorly designed and it's impossible to keep the ball in the upper half of the playfield. Houdini is a KLUNKFEST! Not for the average pinball player. About the only machine that's worse is Alice Cooper's Nightmare Castle. Do yourself a favor and just enjoy them out in the wild as a barcade or something. None of them are worth the purchase price right now. I will agree the cabinet and quality of the machines seems very good...they just haven't had a hit pinball machine yet. Same thing goes for Spooky with the exception of TNA....that is Spooky's best pin. Halloween.....eh....save your money there....it's not a good playing pin either! If you must spend money on any pinball machine right now and want a NIB go buy yourself a Godzilla.....it's without question Elwin's best pin and when the dust settles from the hype it should be one of the All-Time Great Pinball Machines.....it's really well done....even the Pro Model is worth the asking price.