During the demo I put on last night I used the Capitals for the first time. I played against Algeroth in a 7/7/7. We used victory zones with no points.
I used 2 ranger commanders, 4 ranger elite, and 2 marines. I won handily. The card that made the game for me was Trick shot. I took the command bunker immediately and that along with the cards buyback I was able to play it over an over. I moved my rangers in units and picked apart the Algeroth forces at range and from behind cover. It was brutal. Algeroth was only able to get one unit through my defenses (I screwed up and took one of my rangers off guard I shouldnt have). He killed one of my commanders but on my next turn I used a gold order and " fire at will" with my other ranger. (another fantastic card)
Overall I was very impressed with the Cap's. I am going to be using them more from now on. I want Mitch now!