Great show. Worth the price of admission, even if you don't buy anything (a feat I've yet to be able to pull off).
You'll see guns you've only heard about, or seen pictures of.
The pricing tends to be slightly high, on average. But there are always deals to be had.
Best bet, if you want a deal, is if you know what you're looking for in advance, and know the going prices for that item. There will be a LOT of guns that are way overpriced, because the owner overvalues it, or doesn't actually want to sell it. This second bit is a bit of a thing, guys telling their wives that "honest hun, I tried to sell off some of the collection, but there just weren't any buyers this year." Almost a running gag.
It's a huge show. You really do need the better part of the day to see everything. The best deals can be found on the least organized, nondescript tables that most people just walk past. Those are the tables that you need to stop, look closely at everything on the table, and look at all the pricetags.
It's also a bit of a social thing. Always run into people I know there, chat with some of the dealers I've gotten to know over the years. Most of the forum sponsor retailers will have tables there. It's nice to put a face to some of the online retailers.
Also... Wear deodorant. I swear that there's a whole segment of the attendees, that this is the one trip they make to the "big city" a year, after crawling out of a cave innawoods, and haven't seen a bar of soap since WWII.