Review (1/5): Garbage! Twice!!
Believe the negative reviews. Bought first unit. Each "session" is 4 smaller sessions. My first unit quit working after the first mini-session.
OK. Things happen. Amazon replaced and sent second unit. Second unit did the exact same thing. Saw others saying they had to re-charge constantly. Tried that with no love. I'm not even going to bother returning or replacing. It's that bad! DON'T WASTE YOUR MONEY!!