I've been using the Bitshares and the Komodo BarterDex for sometime. Komodo seems to have the most secure and feature rich platform as of this post. Bitshares is also an amazing platform but limited in comparison. I agree with Hive account@blockbasis comment that DEXs "is the trend that will dominate 2018" or at least it will be in the top 10 areas of community interest and investment.