Handy spot to have nearby- it seems like every major holiday, sports team, and cartoon has a dedicated sp and ot of items available year-round. There's even a section that breaks down costume accessories and cups, tablecloths, etc. by color. Heads up that the wedding area is pretty sparse and right up against the bachelorette items- phalluses and wedding bells for everyone!
In addition to the decor and costumes, store offers invitations and balloons by special order- I haven't used either service, but I do come by frequently for seasonal decor items for my classroom and campus events.
Staff are not particularly helpful and prices can be a bit high- if you have enough notice to shop online or need a large amount of something, that may be your better option.