Pretty underwhelming for the most part.
First off, the parking lot people are assholes. Had to get that out.
The shop is much smaller than you would think it is. And half of it is dedicated to cheap, touristy crap that nobody wants to see let alone buy.
And don't expect to see any of the guys from the show. They're never at the shop any more. I mean I get it and it makes sense, but it's kind of lame.
Overall I'd give it a meh. I get it if you love the show, but this isn't more than a ten minute stop.