I have a friend in the US who uses it, and I find it
inconvenient, chiefly because to use it for tea, you can put the
leaves in the little bowl provided in the scale, if you place the
leaves heavier on one side, the weighing is inaccurate, you have to
place the leaves right in the centre of the bowl to make sure the
scale weighs it accurately.
I understand that there is a diamond wholesale shop in Chinatown
(friend says Mosque st, but I couldn't locate it) that sell this
scale as well as the digital one, prices about S$40-50 for the
basic model.