Insufficient content and no information on the mixing ratio.
I bought an epoxy repair kit from them. Upon opening the can, I discovered it was only half full at most. I weighed it, and with the tin, it came to 215 grams. The can clearly states 250 grams, but only upon closer inspection do you see 156g of resin and 94g of hardener. This is a rip-off! Furthermore, there are no instructions whatsoever regarding the mixing ratio.