I bought this scale recently on the recommendation of one of the members here. I've had it a few weeks now and love it! You stand on it, wait for it to beep. then you pick up you cat, box, baby, whatever you want to weigh, and stand back on it. It will show you just the weight of what you are holding
I just bought this one recently. It's nice and flat so you can tuck it away when you aren't using it. You can switch units from metric, pounds, even stone! I paid less than the price posted there, got it locally. Sometimes you can find good prices on used baby scales on Craigslist.