I think the first real DEX which will attracked volume and will have a great UI will be NASH.IO

Just take a minute to look at the co founder Fabio about why this is a real DEX also opensourcing sdk and api to developers best thing I saw in a long time, and yes I get the same feeling as I did in 2012 when first learning about Bitcoin... 

https://youtu.be/Lz5g1VG5xAs

#trustyourselves do your own research!!!