It's nice for a change to see an action show where the lead actor doesn't go for 10 minutes of a firefight without changing a magazine or just running out of rounds. Also, not invincible like ARNOLD and has a great sense of humour, such as what he says when he gets back into the jeep after "concealing" a knife in Episode 2, about "Being a bad time to f**t".
On the down side, his daughter would not know about the soldiers killed as that is simply not talked about. (This comes directly from the horses mouth). Also, using a Huey helicopter is the fastest way to advertise your presence for 20 or 30 miles in every direction as they are the loudest helicopter in the last 40 years. They have been out of military usage for quite some time, a Black Hawk or Pave Low would be far more realistic or even a Little Bird.
One of the problems for the North American audience is that some of the terminology is unknown, such as when Porter is told that he is lucky to have "beaten the clock" as this not only refers to completing the mission on time but getting out alive and not having your name engraved on a plaque on the clock tower back at base in England. Another is that Department 20 goes back to WW2 when it was a cover for espionage of various sorts, 20 being "XX" in Roman numerals, or "Double Cross"
One last comment about the Brits versus the Yanks, the British military does not give out the "I was too stupid or slow to duck" medal, ONLY the Americans do.
As far as other series go, the best one put out by American television was "Tour of Duty", at least that is what a bunch of us think.