Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Be careful!

The lady at my spa uses this product, and it does not seem to be as messy as using tongue depressors and melted wax. Nothing drips on the floor or your clothes. But, PLEASE be careful. I don't know if the wax was too hot when she applied it, but I have several burn marks on my face and neck. I used aloe on my burns after I got home from the spa, but the spots still scabbed over. It seems as though the smaller canisters of wax were the ones that were hottest. Maybe it is Physics being applied here...all the canisters heat at the same temperature, but the thinner, shorter ones have less wax and heat up quicker. It works, don't get me wrong. But who wants to walk around with scabs all over their face?