The show clearly started as a vile 'Friends' copy, whoever denies this should pay more attention, some plots and scenes weren't changed at all. But the 'Friends's stage only lasted a couple of years, the post-coma plot disappeared and the series became a standard comedic show. Once there it became repetitive and bland. The kind of humour in this show was formulaic and predictable, just awful. A short conversation always preceded the punchline read by an angry character to the 'dumb' one followed by the canned laughter. Later, they included political jokes, giving a 'political' dimension to some characters, this was, in my view, a mistake.
The cast significantly changed throughout the years, and not for the better. I deeply respect Javier Camera and Amparo Baró's performances but I can't say the same about the rest of the cast. People like Eva Santolaria, Guillermo Toledo or Santi Millán should be kept miles away from a camera.
The success of the show can only be explained with the lack of competition and the abyssal level of Spanish TV.