Product review (1 stars): Questionable parts
The hi cut gave out after about a month.  You can just bang them around to re-set them but still that's a huge pain.  Lint run is clean, there's no way it's getting up to 309 so the parts are probably to blame. Seems likely they are inconsistent in quality.  Person A could buy one and have it last them 3 years, Person B could buy one and have it last a month.  Roll the dice if you wish.