This is the sharpest razor (electric or disposable) I've found. It's perfect for those who have strong hair and can't stand stubble. As it's so sharp, there's no need to go back and forth over the same area but you must use caution: use after a hot or warm shower and after using a moisturizer. Be extremely careful and gentle, especially on any area with THIN skin, such as the ankle. If you're not paying attention, you could easily sheer off a strip of skin. This is a single, straight, very sharp blade. After the first use, store it with the cap off to prevent rust. The life of one blade is very good: it does full legs underarms about 7 times before it gets dull. This gets a 4+ from me. Nothing else is as sharp.