Surprised that Chuck Lorre was involved in something of this quality.
I only know of his recent work on Two and a Half Men, Big Bang Theory and other basic network sitcoms. So, if he's written great stuff in the past I wouldn't know. I've looked at his IMDb credits and nothing caught my eye as being something I'd heard of receiving critical or audience acclaim.
Anyway, this series is pretty good, not amazing but one major plus it has going for it is that the main characters come across as believable people. That's partially due to the acting of course.