I tried to use it today, and burned my left hand rather severely.
I put ice on it immediately, and minimized the blistering that way, and then poured anaesthetizing medicines all over it, but it still stings like hell.
Also I was so busy concentrating on the large burn across the middle of my palm that I completely failed to notice a smaller burn on the side of my index finger, and thus failed to ice it properly and developed a more full-fledged blister there. But it's my palm that really hurts most by far. You can see little wrinkles where the skin wanted to blister but due to my icing it no real blister quite developed. Anyway, it really needs to cease hurting so much, because the stinging is making me quite unhappy.