Etherdelta has a shitty interface and everything is pretty slow as well as the fact it does not have a very good graph and you would not be able to cancel your orders when you place them.
However, it is a really REALLY good place to find the up and coming coins before they are listed on an major exchanges.
Its an opportunity to buy low market cap coins early on, and multiply your money. Obviously there are a lot of shit coins on there but you would have to do your research.