No armrest IMO. I don't have one in my car and my arms never gets tired. I have the habit of resting my hand on my lap when it's long trips so it's always in a relaxed position. The only real complaint I have is the lack of extra storage but I probably use the two extra cup holders more than I would the storage.
That said, you'll get used to whatever you decide to use.
Hatch Nation #13 : Rally Revolution #13 : ROTM Jan '13
It's Bryan, not Brian