I have loved this comedy since it was first shown in 1975 (the second series following in 1979). I wondered how they were going to overcome the visual aspect where no dialogue was present. This is accomplished by having Andrew Sachs as Manuel providing linking narration. Although I found this annoying at first, I got used to it very quickly and it really helps fill in those blanks.
I haven't worked my way through all twelve episodes yet (currently on "Communication Problems") but based on the first 6, I would thoroughly recommend it. I do have one very minor quibble and that is there is a line of dialogue missing from the end of "The Germans" where one German says to the rest of his family "How on earth did they win the war" (or something like that). I can't understand why that was cut as it's no more likely to offend anyone than the rest of the episode. Maybe it had something to do with running times although cutting that would only save about 5 seconds.
It's a shame only 12 episodes were made, although perhaps if it had gone on longer, the quality may have dropped. As it is, each episode is perfect. A master class of comedy writing.