From the perspective of someone who's never played a Halo game:
Guys, this mod is gorgeous. The ships look better than the ones in the stock game. I love your visual effects for things like phase-node traveling, missiles, and the plasma gun. It's a feast for the eyes.
I'm used to the Sins style of play (which most mods I've played tend to emulate) in which combat is pretty slow, and ships can trade a ridiculous amount of volleys before one of them finally blows up, so this mods combat balance came as quite a surprise. For lack of a better word, I'd imagine this mod is much more 'realistic' in terms of how quickly ships are blown up.
Two opposing fleets meet in space, and a lot of ships are popping on the opening salvo. 3 seconds into the fight and already there will be heavy casualties on both sides thanks to the opening salvos of the long-cooldown MACs and Plasma cannons. It's brutal, but somehow feels 'right'.
For anyone that hasn't tried this mod: If you wish Sins's combat was faster/more intense (more 'realistic'?), then this is the mod for you, without a doubt.
If you're one of the people that like slow-paced gameplay focused around building caps only and having few losses, then this mod would not be for you.
Expect heavy losses in this mod. You're fighting a war of attrition against far superior opponents when you're playing as the humans. The devs of the mod translate this to the game quite well. You'll need to out-zerg them and use your ship's abilities carefully so as to not waste a shot.