Had two people weigh my bag with the same unit and was two pound from the limit before we checked in at the airport.  The airport scales (both I tried) said my bag was 2 pounds heavier than the Travelon scale had read. Good thing I kept it below the limit or I would have been paying extra to take that bag with. It is nice how small it is though, I'm going to keep it just remembering it's off by a few pounds is ok with me.