I have never bought from them, first off. Football collecting just isn't my thing. But you should know that the owner got picked up for doctoring GU items. JO was building a great name for themselves amongst collectors and then something came out about fake items early in there existence (or something to that reguard).
Check out the links below for more information.
Click
here, or
here, or even
here.
Again, always do YOUR homework and in the end, YOU the collector, has to be comfortable with the item...no one else. Hope these help you make up your mind. As I said before, people had great experiences with the company...then news broke. A lot of people still buy from them, but a lot of them don't.