While I certainly commend them for being able to make this work (we need more innovation in management practices across the board), it does seem like there's a bit of a holier-than-thou trend in this comment thread.

As the founding engineer at my current startup, I have tremendous flexibility in setting my own hours but I willingly and intentionally work 60+ hours a week. Not because any manager pushes me to. Not because I even have to. Simply because I genuinely enjoy it.

Indeed, work is probably the most enjoyable thing in my life. On a given Friday, I'd rather be building products at work than watching a movie or engaging in some other leisure activity. Some of us don't have wives, children, or friends—we just want to spend our time executing.

Would Treehouse be accepting of that? If not, they're just choosing to enforce a different paradigm of work rather than giving their employees true freedom.