So especially this time of year with Halloween a couple days away Party City is the place to go! They have one of the best costume selections around. There keep it so organized as well. I hate even looking at costumes at anyone that just has everything thrown on the same rack in no order what so ever. It drives me insane. I love how Party City just does the big wall though and you tell them what costume you want and then go grab it form the back and then you can even try in on as well. Their organization is just great!
Now that i know that the party is over and halloween has passed, but i think i might consider the website for buying costumes for next year.
I think Party City is good for costumes. As far as decorations or party favors, I would stick to the dollar stores for spiderwebs, cut outs, treat bags and party favors.