I watched this series when it was first released and it's even better now than it was then. With all the over dramatic, totally unrealistic scenarios in current comedy series some good clean silliness is a welcome break.
Having gone through the British school system the personality defects and odd behaviour of the staff is completely believable and very funny.
I just wish there was more of it. 2 series of 6 episodes is not enough, I wish I knew why it ended.
I can only assume the bad reviews are from Americans who have never met a British person, let alone been here and don't get our humour. No-one is comparing this series to the predictable American sitcoms and nobody who has seen this ever would.
I mean one reviewer actually gets on their high horse about a married man "carrying on" (which would never happen in an American show!), a veiw that can only be explained if the reviewer has only seen a 10 second dream sequence in an episode titled The Dream and not watched anything else.
This was also never touted as the new Fawlty Towers. I wouldn't have watched it if it had been.