I gotta say, as a military medic and EMT for almost 4 years, that kit is pretty useless. Sure it's got bandaids, some sterile gauze, and a few other odds and sods for some minor dialy scrapes and cuts.
But if you show up or are involved in a motor vehicle accident, there is nothing in that kit that will be able to handle anything beyond minor. I suppose it is better than nothing, but I peiced mine apart a long time ago and made up my own with pressure bandages, a disposable CPR pocket mask, a bunch of gloves, sterile gauze and abdo pads, and emergency airways ( yes I know those are beyond the level of your average first aider).
So yeah I guess it's better than nothing, but in stark reality I'd rather go to a medical supply store and consult with them for a decent car kit and pay a little bot more, than show up at a bad car crash and have my pants around my ankles with my peapods swinging in the breeze.
But that's just my 2 cents. I apologize for the rant, but medicine is something Im fairly passionate about