It wasn't a suite. From what I understand, the only suites they offer for the diamond upgrade is a junior suite that overlooks the terminal.
I much prefer having an outside/runway view room, and quite honestly, this room was as big as the junior suite, just laid out differently. I was in a junior suite and it was just an L-shaped room.
This was just a really really big room - big enough to have a sofa, coffee table, and chair in front of the bed PLUS a stool at the foot of the bed and more than enough space for 2 people to walk past them.
In addition, there was a wet bar and 2 desks, one at each end of the room. The foyer area was nearly as big as a regular hotel room.