Just having the data alone for me is worth $60. How you make it actionable is still largely up to you. If you're having negative sleep patterns, Wakemate will likely help you identify when they are happening or possibly the cause (ie tracking workouts). But Wakemate won't make you go to bed earlier, thats up to the user.

So it might be difficult to find empirical data on whether it improves your daily energy.

I've had a similar issue with my own product that tracks health data.