I wax my eyebrows generally, but I do tweeze to fix them. I tried this product and it did not numb AT ALL! I would not recommended it, and would advise people to not use it.
I am a hair dresser/ esthetician at a salon, and I know a lot of the "tricks of the trade". (I have my cosmetology license in NJ). A good tip is for people who tweeze is to get a hot towel and place it over your eyebrows for at least 30seconds BEFORE you tweese. The hot water helps to open you pores allowing the tweezeing to be less painful and helps have the hair come out easier. After tweezeing, if you get red, use aloe vera or a cooling gel (safe for facial use) to help reduce the redness; a cold pack/ ice works great too! ALSO, applying pressure helps reduce the pain as well.