"I would like to start off by saying this costume IS probably only worth the $70 it was listed for. The best Master Chief costumes are hundreds of dollars, so I was surprised to see how "cheap" yet good-looking this one was. Of course, then I got my costume and figured out why it was only $70.
The biggest dissapointment was that it is a one-sided costume. The back is completely blank with a large slit. I wish I'd known this because I would much rather had a full costume. The size of this costume has been a big negativity for all the reviews I've read---I almost didn't buy it because of this. However, I sucked it up and thought I'd be able to modify my costume. Turns out it was better than I thought, and with a couple pins here and there it fit me fine.
My next complaint is the arms-the "gauntlets" don't even go all the way around. Again, it's just one side. This strikes me as a lazy, cheap costume not worth the money. Not only that, but it doesn't even come with gloves. I had to spend MORE money just to complete it.
Lastly, the helmet. It looks awesome, but it is way big. There is nothing that keeps it from moving around, so I had to attach a strap inside it (from another helmet) to snap around my neck and hold it in place. I really hope whoever makes these costumes reads this and at least attempts to improve this.
Now, I know I'm making it sound like it's a horrible costume. But really, at the end, I looked good in it. The parts that were the actual armor (and not the lame designs on the cloth) were really nice. On trick-or-treat night I recieved a LOT of compliments and "Wow! Look, it's a Halo guy!!"
All in all, if the helmet was improved and the costume fit a bit better, I would give it four and a half stars. If the back wasn't completely blank and had armor, I would give it a billion stars. If you don't mind modifying it a bit or only having the front costume, then I'd recommend this."