Here’s my responses to the article’s specific claims:
You’d be healthier. Yes, I generally get more exercise. I’d already changed my eating habits to avoid snacking and this hasn’t changed.
You’d sleep more. Not sure. Seems about the same although I can vary my sleep time to suit my own activities.
You’d be less of a jerk, probably. You’d have to ask my wife that.
All of that, plus, you’ll be better at your job. Not sure. I'm slightly less aware of what’s going on in the office and wider industry but in general more relaxed.
On balance it’s been a really good thing. I haven't managed to progress all of the side-projects I intended to but I have definitely achieved my primary goal of improving my life-work balance. The pay cut is tolerable and in any case my wife and I were planning to scale back some of our more expensive activities (such as going camping rather than staying in hotels).
It's also sent a clear message to my colleagues and management (all of whom have been supportive) about my work expectations. I still have responsibilities (e.g. for deliverables) so there is still pressure that doesn’t go away. I also tend not be the first pick for activities that require long term full-time commitment, or for the company to make an investment in my personal development (e.g. training in new skills). To date this hasn’t been a real problem – I'd made the decision to scale back because I'd gone as far up the corporate ladder as I’d wanted to. And I feel the same a year on.
The way I explain my mood to people is “Monday mornings are just as crappy as they ever were. But when I leave work on Wednesday, it’s already Friday.”