I went opening weekend, and I think it's going to be good! They already had a clearance rack and I was able to pick up some t-shirts for my son for about $4. They also had a lot of toys but IMO, most of the stuff was the same stuff that they have at the regular Disney Stores. They did not have park merchandise (yet - at least when I was there).
It's certainly worth popping into if you're going to be there; it's across the "street" from the Osh Kosh store.