Yes, I thought so, too, but they suck at material choices and ergonomics. Also, they don't have an API. Since Intel bought them, Basis Peak seems to look and feel better, but where's the API? Anyway, Microsoft just made a no brainer to decide - they offer everything that everybody else has (except pulse oximetry that Amiigo was supposed to have - not sure if they delivered it) and much more at the same price.
I've had a B1 for 1.5yrs. They've promised a public API since before that time, but it still doesn't exist. In fact, I have a hard time thinking of any features they've added this entire time (in fact it's terrible as a watch since you can't set the time/time zone except via the web and after a full data sync, making it often useless if you travel much).
I finally got the Amiigo a couple months ago - I didn't see SpO2 stats detailed. It was actually pretty underwhelming - the Amiigo doesn't have the promised API/SDK either. The MS Band's sensor suite is better (GSR, skin temp), it's just too bad it's not waterproof.
