I personally, think it is pretty amazing. The ammo and health packs were abundant, but the way the gameplay was, you needed most of it. I did find one HOM on "The Asphodel Meadows (III)" where one part of the water was not textured, but it is a Beta and there will be mistakes, glitches, etc. Overall, It is definitely something all Marathoners should play. The abundance in enemies and allies made it feel like a realistic, albeit chaotic battlefield. This scenario is something I am looking forward to.
I really love Halo,especially Combat Evolved.Can't wait to see more.