Instruct: Classify Amazon reviews into positive or negative sentiment
Query: WARNING: Thin Gold Layer rubs off, then spikes puncture skin.

While the company claims this device is "Plated with 24K gold to prevent puncturing the skin" What they FAIL to mention is that the gold plating is really thin and rubs off after several sessions. After that the "spring loaded tip" tends to shoot the spikes directly through your hand. As a result I have experienced all of the injuries it claims to prevent including chronic pain, arthritis, headaches, colds, stroke, diabetes, heart disease etc.My doctors say the symptoms will dissipate in a few months now that he has extracted the orange spike covered ball from my swollen, bleeding hand.