Hey, I used their EMERGE pre-treatment gel. It works like a charm. They claim that gel will last for about 60 treatment sessions, but in reality it is a bit less.
Never mind that, trust me, this gel worths every cent. My skin looks youthful and I feel great in general. I even stopped doing chemical peels as my microdebrasions almost completely vanished.
And to answer Regal from above - don't use any untested China products. Better to pay a bit more money for verified lasers.