0x Protocol exchange is an exchange with which I haven't had any life experience with, therefore, all I'm writing on my review is based on research and surveys.
This exchange doesn't really have a clear history on its website. I expected the information of the origin and copyright to be at the bottom of the page but, I couldn't find it. That aside, the website provided on revain doesn't match the name of the exchange. Though I think they are connected in some sort of way, but I still believe this can confuse traders because the name on the website is entirely different from the name on revain.
Well on the website, connecting your crypto wallet is very fast and easy. As a trader, I cannot advice you to trade here or not to trade here, because it is quite nice.