Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Effective, cost-efficient, (unintentionally) disposable

As a trimmer, the NE-3 functions beautifully: after a year of biweekly use I have never once felt the discomfort of an unpleasantly pulled hair. However, as a device the NE-3 is not particularly sturdy: after a year's use, and maybe most the life of the battery, the on-off switch ceased to function. For a while I could get it to run by pressing the on/off switch into the trimmer case, but now even that's stopped working.If you're willing to pay $8 for a razor that will likely break after a year's use then this is an outstanding razor to get; if you want one that will last you, then--like me--begin to look elsewhere.