I really enjoyed this product and it seemed to be working great. There were times when I couldn't get any suction, but I believe it's because any little particle in your mouth can get caught into the tubing, so you must brush your teeth right before putting in the mouthpiece.
However, my power cord's tip broke, and now I need a new one but can't seem to locate them anymore. It appears they are out of business but trying to fool us by saying they were overwhelmed with orders and they will get back to you. I doubt that. And I just finished paying off the product with PayPal.
Bottom Line: No, I would not recommend this to a friend
How much did the machine cost?