I've purchased 5 or 6 of the Disguise helmets now, and repainted all of them and sold or gave as gifts to friends. For the price, they are great, but overall, not overly amazing. The visor visibility is ok at best, and the biggest issue I've found is that the helmet is too "shallow". Meaning when you wear it, you can see the lower portion of your jaw/chin. Its not "tall" enough, to hide your full head. But for as cheap as $25, you really can't complain that much. I have one just sitting at home to use when messing around or whatever, something I wouldn't do with a Stony Props Chief helm for instance. But overall, if you want something decently accurate, cheap, and kid friendly, then the Disguise stuff is great.
As for the full suit, I imagine the price will be going down now that Halloween has passed, and if you want a near complete suit with little to no work needed, then its the best you're going to get.