I bought this to replace an old style hand held scale with hook for weighing luggage.  This scale is small and light and can easily be slipped in your carry-on bag to take on your trip.  It uses a strap to connect to your bag for weighing so no hook to worry about hooking your clothes or yourself on.

I've tested out a couple of times now and the weight seems to be accurate.  The unit itself is sized so you can use one hand or two to lift bags and the digital display stays on long enough to get the weight without trying to hold a bag and look.  I have no idea what I'd ever use the temperature display for but it's there if you care.  Overall, a very nice unit for a great price.