I've played the first map and it's pretty good. I'll state my thoughts on the various aspects of the map -
SPOILERS for those haven't played it yet:
Good stuff:
+ The story was interesting and well written.
+ Dialogue was also good and the timing of the transmissions was appropriate.
+ Gameplay was interesting and unique, being given control of a large amount of Zealots. Objectives were clear enough and the beacons were easy to find.
+ The battles between the Zerg broods were enjoyable and gave a good feel of the despairing situation on Aiur.
+ Difficulty was on the right spot: it grew more difficult later on as I kept losing troops, but overall it's perfectly balanced imo. I only had a few Zealots in the last few moments before capturing the Fleet Beacon and my base was under attack by Mutalisks, but I didn't need to load the game once. With a few more mistakes, it'd have been much harder for me.
+ The map was very straightforward and tactical.
Bad stuff:
- The terrain lacked detail. More doodads and different layers would be good.
- No ambience at all, other than the cinematics showing the battles: few sound effects, no custom music and, as I mentioned above, terrain was less than immersive.
- Although the mission objectives were clear, they should be displayed on screen as well. Also, as someone said, point out that we can't build air defenses.
- A few grammar mistakes, like "perimiter" and "Auir".
Overall:
The map is pretty good and the campaign has a lot of potential if the following maps keep up with it. I find custom music to be vital for a good map - it does much toward setting the mood, so it should feature some of it IMO. I have a reasonably big library of sfx and music here, so if you're interested, PM me.
Going to play the rest later today or tomorrow.