I'm wondering which hydrid crypto-fiat trading project you speak of. I think there are several, because for mass acceptance of crypto we need easy on and off ramps to fiat. I think that's what you're talking about, or are you just talking about an exchange with hybrid products but no on / off ramps?
I am on Bittrex for trading but it doesn't handle fiat so I also have a Coinbase account. I know Coinbase has an exchange too (GDAX), but I haven't tried it.
I'm also interested in trying Binance because I hear good things about it. Maybe you could say something about Binance and/or the Coinbase exchange.
RE: Crypto Exchanges: What Would You Like To Know About Them?