Hi Mark,
I drive an 09 plate 220d. As C2ESH said, for comfort, quietness and spec level that comes as standard you will not beat it. There are or can be some problems with them just as there can be with any make. No the mpg figures aren't the best for an oil burner but apart from that not really any different from the Germans in terms of running costs. If you decide to buy one, get the best you can with the best service history you can and remember that the "220"d stopped either '09 or '59 and was replaced by the 200d which I think was a detuned version opf the same power unit. I can say that if you do go for one of these, you'll enjoy driving it, get out feeling as fresh as when you got in, and you won't be surrounded by lookalikes.