The booster gel itself is good, and my skin improved after using it. The inconvenient parts are: first, as others have mentioned, it's too sticky. It would be convenient to use as a body product if it came in a larger size, but this is face-sized. I wish you would sell it in separate sizes for face and body use. Second, when about 1/5 of the gel remains, the pump doesn't work well, and even when I flip it upside down, it all sticks to the container walls, making it very inconvenient to use everything. If this is the case, I think it would be better to use a lid container instead so I can use every last bit. Both the device and gel are good quality, but I hope you'll modify and reflect the inconvenient points that consumers consistently mention.