Sorry I do not find this product easy to use for luggage weighing as trying to lift the case off the ground and read the weight at the same time is almost impossible - will use it in the kitchen for smaller items.
Took a long time to come, 4 weeks, but I suppose it was from China so I shouldn't have been surprised. Came well packed. I tried it on an item I weighed with my Kitchen scales and it was only ever so slightly out, not enough to worry about. I bought it to weigh stuff from my allotment, including heavy items like pumpkins, lots of potatoes etc and feel it will be up to the job. Lots of people have said it's useless because of the small hook, but this can be overcome easily by either putting the items in a plastic bag or other bag to weigh or wrapping rope around the handle of, say a suitcase and forming a loop to put on the hook. I think it is such good value that I'm going to order some more for my fellow allotmenteers.
I've bought 1 of these last August. It had a blue backlight and was as described - and very useful. Since then, in an attempt to buy similar, I've purchased 4 more in three separate purchases and not one of them has had a working backlight.
They are much more useful if they have a backlight. Without a backlight you need a torch or to have it facing a good light source.
So the last 4 I've bought have come with NO BACKLIGHT.
Used this on a recent trip to make sure our cases were under the airline allowance and evenly weighted. Compared to the weight the cases were on the airport scales the device is very accurate. I also weighed some old dumbbells and got accurate readings.
The hook isn't big enough to hook onto the handles of some cases, but tying a short length of string around the handle solved that problem.
The scales are easy to use, they appear to be very accurate, they measure in 5g increments, I have checked mine at 1.6kg and 130g and were accurate to 5g. Surprisingly good for the price. The hook is small with an opening of approximately 1/2 inch. Offers measures in Lb, oz, Kg and JIN (Chinese weight). I have ordered another.