Ask HN: Work Life Balance at Facebook

I recently got an offer for senior software engineer (E5) at Facebook. I'm excited, but I'm concerned about WLB at FB. It seems that the consensus is that work life at FB is very demanding.

I'm interested in hearing any personal experience that is counter to this narrative from the folks who work at FB. Are you working 40 hours or less at FB? I wanna know.

Can I expect Google or Microsoft level of WLB at FB? If so, which teams are the best for this?