These do sound really good, much fuller than their form factor would suggest but if I hadn't already purchased them I'd hold off. They are pretty buggy, lots of people having issues with them.
I ordered them with my new Note 20 Ultra and they came in Wednesday. First impressions:
Sound: Really good, the bass feels fuller than a bud this size should be able to reproduce but the highs and mids come through and they are very well balanced.
Fit: they fit amazingly well and I can barely feel them in my ears. Very comfortable due to not entering the ear canal.
Noise suppression: this is where an open type ear bud suffers. There is some suppression but I'd say noise is maybe 20% less with steady sounds (motor noise, AC, etc.). You can still hear voices, etc. with noise cancelling on.
Bluetooth connection is a mixed bag. I've experienced intermittent drops with the left bud only. Not sure why. Did some troubleshooting to see if I could isolate the issue but it hasn't been 100% resolved and this is after updating the firmware in the buds. Fortunately it's not constant so it's tolerable, hoping it's fixed in an update. I may contact support if it continues much longer.