We currently live in Sydney and the TV is not good in Oz, so on those long winter evenings (!) thank goodness for satellite and the UKTV channel we get which shows lots of UK drama and soaps. I caught an episode of this series and had to get the DVD as a result. I wasn't disappointed - I'm amazed it looks like they only made one series.
It's filmed in such a way that you really feel you are following the action with the team, and the angles and tricks used give you none of the feeling of "it's all acting" that you get in some equivalent US dramas.
The acting is good, but really the plot and action carry you forward - it's got a "real life" feel which is very compelling. The little tensions between the characters, and elements of their personal lives are glimpsed but not over played.
Finally - can't believe old Tarrant from Blakes 7 (Steven Pacey) has such a bit part!
Thoroughly worth watching - although you might want to pace yourself - watching a few at one go and the pattern gets kind of similar.