Sure - this place is a total tourist trap, yet somehow I still manage to stop in on virtually every trip to Las Vegas. Where else can you get the elusive mystery colors not offered in stores? Even better, they recently installed a candy printer that will print the text and graphics of your choosing on a bag of m&m's while you stand and watch.
Is the place a bargain? Heck no! But you're not really in Vegas for a bargain right?
Be sure to walk all the way upstairs before buying anything... otherwise you may regret your purchases.