I've gone to it in the past, a few years ago. It's a fairly small expo, but they have a lot of nice stuff there. Now that chams are legal in Mass, I would guess that it's going to be much better! The one in Manchester is much bigger. As far as whether it's worthwhile to go to or not, it depends on what you're looking for. If you're looking to buy a chameleon, I would say you might find something (probably panthers or veileds). If you're looking for feeders, it should be pretty good for that.