This is probably my best buy on here so far but the real challenge was sizing. The size 10 does not fit my fore finger but it fits my middle with some force and ring finger with no issue. I went to costco to check my ring sizes checked, and they were as follows, 9, 10, 11 from my ringfinger to my forefinger. So this information may be helpful for someone else. It is tracking my sleep, heart rate, stress levels and oxygen and so far, it appears to be doing it well. We'll see how it performs overtime but i'm totally satisfied with this purchase and recommend it.
I enjoy it. Battery lasts 3 days but it also charges fast. I would say go with your normal size unless you have swelling fingers.
Good functioning. The size is large, I recommend going at least one size down.
Seems to do what it’s supposed to do. Good value.
Working great