I, too, have been meaning to have a look at this but as yet, not tried it. It looks okay, but will it fade away? As Nick says, he got bored with it after a while. I don't really want that to happen if I start watching it.
As above, couldn't stop watching it, thought it was excellent and based on the true story of a very interesting part of modern history, a few of my friends complained about the sub titles but I found it ok.
I've watched both and found it to be very good. I enjoyed the 2nd series a lot more than the first and it definitely picked up a bit towards the end of series 1.