My assumption based on earlier marketing materials was that AW would check your activity in the background (including heart rate) and close your circles throughout the day.
In actuality, if I don't engage the Workout App, it is near impossible to close circles. If I do engage the Workout App, I can sometimes double or triple my circles.
A fitness tracker should be able to monitor your activity in the background in order to pick up all the things you do even when you are not going for a dedicated workout session. The Workout app should be used to give added functionality (i.e. distances/GPS, timers, and even more accuracy by more frequent heart measurements). But it should not be this different with and without Workout being open.
The way this currently is, I absolutely do not trust my rings to be accurate at all. And if they are not accurate or consistent, how can you even use them to monitor progress? This thing is basically worthless as a fitness device. And that was the main reason I purchased it.
Never done this before, but I sent a letter to Tim Cook expressing my disappointment with the way Apple has handled this aspect of the Watch launch. Changing your marketing material after the fact is simply false advertising. Many people purchased this to be a fitness tracker and it simply isn't.