I've just finished downloading and installing this, I'm gonna have some tea then have a go at it. I'll post my inane ramblings about mechs later.
Edit: Well, I've played a few (four or five) rounds, and it's quite fun. At first I thought it was another boring FPS but with jetpacks and robots, and wasn't having a whole lot of fun. After about 30 minutes, I realised that different elements of your robo-suit can be combined into highly effective manouvres (the obvious being 'run fast, jump over enemy, drop grenade, shoot in back'). Then I realised how the missions work. Essentially, every now and then (I haven't worked out if it's timed, random or based on your team's score), your team gets assigned a mission. These are simple things like capturing the enemy's intelligence, or escorting an officer to another part of the map. You can do these missions to gain extra points, which can be spent on mech walkers, turrets, and other things not allowed in the beta (tanks, scanners, more advanced turrets). The points also help your team to win.
It's quite fun, and a
TG squad supporting each other by repairing each other's armour, covering each other and launching synchronised attacks would be devastating.
Worth a play, I'll be buying this one when it comes out.
(Oh, and if you're in a mech, you can pick up an enemy soldier and punch him away, Crysis style.

)