Positives: They make them in tall sizes!!! And they seemed to be high quality, and the order, delivery, and exchange/return process was smooth. There was sufficient calf compression to make the lower legs difficult to get on and off, similar to compression socks.
Unfortunately, I need compression going all the way to the waist, but these don't do that, and I didn't realize this when I bought them. I exchanged for a smaller size (smaller size than recommended, as well), but still didn't get any abdominal or upper leg compression, so I returned them.
If you're looking for ordinary tights with built-in knee-high compression, you may love these. And did I mention they make them for tall folks? I really hope they'll make some with full compression, all the way to the waist band, someday.