I am looking to buy Ultrahuman ring , can one share feedback for the same ?

I'm using it for the past year plus.

It's good if you don't have life altering expectations from it.

Does its job very well, but the metrics read are not absolute; but an indicator to help you with decisions.

I generally tell people to check built-in error with all these wearables.

For example - Apple Watch usually show higher calories burn against more sophisticated laboratory setups.