I really really love this programme. The writing is brilliant, and the acting by both DF and AM is perfect, I think. I agree with posters who have said it shouldn't have been billed as a comedy, because of course you'd get all the My Family fans tuning in and saying 'where's the laughs?'
I think the subtle way it's written is amazing, putting a lot of trust in the audience to get things, and accepting they might not, but not shoving it in anyway just in case. By episode four, the whole baby story was unbearably moving, mainly because of the largely unspoken aspects of it. Also, some of the best lines are just thrown in quickly without signposting ... like when Val was saying she couldn't come up with a solution to the email situation, 'There's nothing' and Roger said in a panic 'there was nothing before electricity was invented ... come on'.