I just gave it a whirl, on the whole it was pretty fun.
The dialogue was pretty good, though a bit inconsistent (all pilots had names, but some missions used during the message to identify the pilot). Even so, the larger amount was nice.
The briefing animations were pretty smooth also, and further pointed out some method of setup that I need to acquaint myself with.
On the other hand, there were still a few errors in the text. Primarily grammatical errors, but nothing overly annoying. I also thought the last mission was a little too scripted; you might consider giving some of the craft the light anti-ship weapon that Blaise Russel uses in the opening missions of the GW campaign (forget its name), I think it's included with the port. That might help some of the enemy craft carry out their objectives. Some scripting is cool. Also I broke the last mission somewhat by the final "enemy surge" (don't know how to do spoilers) but the debriefing didn't take this into account. It probably assumed that I would accomplish that.
All in all, it's good to see some missions being released and I look forward to many more.