I bought the Reveo Marivac a few years ago when my local Barbecues Galore store was selling them. It speeds up the marinading just like the food saver containers do but the tumbling also tenderizes tough cuts of meat. While the meat's pores are open absorbing the marinade, the tumbling drum which has paddles, flips the meat end over end stretching the meat fibers. I used it on cheap sirloin steaks with good effect. One day I threw some chicken breasts in there with some Chaka sauce, evacuated the cannister, set it to tumble 15 minutes, went out to fire up the Performer, came back and to my surprise, the lid fell off spilling chicken/marindade all over my counter,cabinets and floor. I was ****ed! Took it back, got another and aparently the vacuum was weak because the lid would not stay on. The only thing that holds the lid on is vacuum itself. I took this one back and was done with it. Btw, the cheapo one has a hand pump.