I got my MyWeigh MX-50 from saveonscales also. FWIW, it resolves to .01g and thus does detect VTF changes at different heights. It reveals VTF changes from arm height adjustments.
Does this matter for listening to music? Not a bit. Except for arm/cartridge changes I use my scale about twice a year, to adjust the counterweight for the hot or cold weather VTF range. After that I use my fine VTF adjuster for tuning by ear, which doesn't require a scale.
Another risk with some of these scales is that some models are strongly magnetic. You don't want a cartridge anywhere near that.