I really enjoyed the demo at PAX East. It was very smooth and had responsive controls. There events where you had a chance to negotiate with your enemies, but if things went sour you had to reap the consequences. For instance one group of enemies had a hostage and was threatening to kill him. Instead of waiting for them to assassinate him, I made a quick decision to kill the enemies and save my team mate's life.
Overall I was very impressed with Spec Ops: The Line. From the amazing graphics, the tight controls, to its dark and mature narrative. This is definitely going on my "to buy" list.
Spec Ops: The Line comes out for 360, PS3 and PC June 26th, 2012 is being developed by Yager Development and published by 2K Games.