I saw this product and thought it would be a great replacement for the battery operated unit I have. No more batteries to charge, lifetime warranty, etc. Not to be the case! First, this product barely even cuts hair! What was a 30-second job with the battery powered unit now takes 3 minutes or longer. Second, this thing pinches skin! Now, the battery powered trimmer will nick you if you are careless, but this thing cuts so poorly that you have to press it against the skin, resulting in pinches. Third, this product pulls hair! The battery powered unit will pull hair, if you accidentally switch it off while trimming; but since this cuts so poorly you never know whether it has finished cutting, and when you try to move it the hair gets pulled. Finally, this product clogs with hair quickly, meaning that you have to clean it several times while trimming. THIS IS A TERRIBLE PRODUCT, RUN AWAY!