I really like the Oura, and have had a 2nd gen which works great for nearly 7 years- battery still going strong. However the 2nd gen had no monthly subscription fee, which I really hate... I am not sure if I would be willing to upgrade, as I have a huge aversion to subscription fees.<p>Overall, I don't really like their software either- in my experience their 'sleep score' is in no way correlated with quality of sleep, just length. The main factor in my sleep score that makes it really high is having severe accumulated sleep deprivation, so I sleep longer. In my opinion factors like sleep efficiency (e.g. not waking up a lot) should be the main thing in the score. Ultimately nobody really knows what "good" sleep is- it is variable from person to person and can't be meaningfully represented as a single number.<p>I generally just pull the data into Python, and analyze it myself.<p>Probably my most interesting finding is the massive negative impact even small amounts of alcohol have on my sleep. Even a single beer 4 hours before bedtime almost completely eliminates deep sleep. I've come to the conclusion that drinking early in the day is likely actually somewhat healthier, despite being culturally unacceptable. I've also found that the humidity really affects my sleep - especially altering breath rate- but I'm not sure what to make of that.