BLEH nooooo. That material looks awful, it looks so cheap even though it's not. And that teal/black combination of polkadots are not appropriate for a prom dress. And same with that black design that frames the bust and into the hip area. Just wrong.
Go with something simple and classy with bead or sequin detailing that's still long and shows off your legs; I like the slit. Same for the bust goes up high so it's not too much skin and the a corset waist, those are redeeming qualities to consider for your next choice.
I like a lot and if you have the bosy and money for it you should deffenetly go for it and the polka dots arnt a big deal the back of the dress is so gourges and so is the color but remember that it will be you the one wearing it not us so you have to love it cause what ever dress you choose will be in the pictures for the rest of your life