I have a digital scale and I have used it for years (2003). Very helpful for measuring my food portions and for making different recipes. The scale has both standard US and Metric measurements. I purchased mine at Bed, Bath & Beyond. However, they are rather common and you should be able to find them at Fred Meyer, Target, and most cooking shops.
For me the scale was an essential tool in previous weight loss. I am currently pre op and I have every intention of using it post op. I currently use it and track on My Fitness Pals. I have messaged with a few others who are sleeved and they (not all) use a digital scale.
I would say this is a good purchase!
Wishing You Wellness,
Sannah