We were at the same show! No big surprise as you live in the Charlotte area. I also got my kit at the show. I was very impressed with the firestarter and the tinder that came with it. You are correct the whistle was a bit disappointing, but the mirror is well made and very user friendly.
Incidently I purchased a kit from Jeff Randall which comes in the same box and has many more useful goodies in it. I comes with a Swedish fire steel along with a fishing kit, bandaids, water treatment, etc. I really like those little "pelican" boxes.
I have tried various pocket chainsaws in the past (but not US Survivals) and while they do cut up a storm, I have found the amount of energy expended for the end product (not to mention the weight of the saw itself) was rarely worth it. Unless I were to need to build a log cabin (instead of a lean-to) for shelter I guess it would have utility, but a good axe, or a good chopping blade will do just as well, with more uses to boot (hard to clean a fish with a pocket chainsaw).