Man, those old ThinkPads just refuse to quit. Grab a T420 or X220 if you want the same thing, they take a beating and you can swap batteries without tools. Just check the hinge and screen before you buy one, because parts get harder to find each year.

90 days is wild, most people quit at like day 4 lol. The sleep notes part makes sense though, you start seeing stuff you'd never notice before. Like oh, I always sleep bad after eating late, or my room being too hot was the real problem the whole time. Now you got actual proof instead of guessing.

Reminds me of when my buddy bought a used table saw off a guy for $80 to save cash on a deck build. Blade wobbled just enough that every cut was a hair off, and by the time he finished the deck boards looked like a bad game of Jenga. He spent the whole weekend redoing it and swore the $200 new saw would've paid for itself in saved time. Cheap tools have a way of billing you later.