The panasonic ER415 nose hair trimmer was given to me as a gift for Chritmas 2 years ago. I had a nose hair trimmer before this only lasted about two years. Overall works well and has no problems attributal to the device. I do have problems cutting nose hairs sometime but that has more to do with operator error than the device. I have to be awake enough to realize the mirror is showing a reverse image. So I am better off using the device at night. It is comfortable fit in my hand. The AA battery seems to last about a year with regular use. It does a very good job of cutting my nose hairs. As a Engineer, I can tell it is a well designed product for simplicity, human factors, maintainability, and producability. It is easy to open chamber to remove nose hairs and parts snap on and off easily and some parts are retained to have few parts to easily lose. Also it can be used for hairs on ears and eye brows when necessary.