It was one of the best decisions I've ever made - it feels like I have so much more time for family, side projects and hobbies than I ever did before. And for reference, I work around 90% from home.
TBH, the company I work for has got a pretty good deal out of this, as I'm sure my productivity hasn't dropped at all. (it's a mega corp, so there is zero chance of negotiating back to equivalent of a 5-day salary)