Worked but need to be cautious
It does its job. However, you really need to be careful to not burn yourself. The gel dries quickly so where there's not enough of it your face would get over-heated. In addition, be careful that you spend the same time on left/right part of your face to not getting asymmetric. The gel could be a bit irritating so needs soothing mask/cream after using it. I'm still experimenting with the device, trying to figure out a more care-free way to use it. In general, effective but not very user-friendly, and maybe don't use it as frequently as it suggests.