This is what we need, i want to see tons of working decentralized exchanges happening.
What is the difference if you compare this to Coinffeine??
The main concern I see with Coinffeine is that they use that micropayment on the Fiat side, that means you have a high number of small fiat payments between 2 accounts of the same payment processor.
That is a pattern which even the dumbest monitoring system will be able to track and so the payment processor or bank will know exactly that those 2 account holders are involved in a BTC exchange.
Who else make hundreds of 1 EUR payents in 1 minute?
So the Single point of failure test will fail as you are dependent on that payment processor/bank to support bitcoin and you lose your privacy.
Furthermore it is limited to OKPay so both traders need an account there. They plan to add more paymnet options/banks, but I cannot image that there will be a big variety (they need an open banking API which is normally not available beside a few modern payment processors). Also I think it will not be possible between different banks due the cost structure of the micropayments. Micropayments can be cheap inside one bank as its only an internal database entry change, but as soon you leave the bank you have higher costs and delays.
It is an exchange model built for banks to letting them take part in the bitcoin exchange business without getting involved directly with Bitcoin (see interview with CEO:
https://letstalkbitcoin.com/blog/post/bitcoins-and-gravy-49-coinffeine-the-distributed-bitcoin-exchange).
Its an interesting business model for banks but has nothing to do with the idea of decentralisation.
It is good to have additional exchange models like Coinffeine but as I said it is not decentralized.
I see it similar to those attempts to include an exchange into the banking account like some banks have tried it (and got closed again after regulatory pressure).
http://www.dagensia.eu is one example for such...
. maybe i dot that, but the 99 other people that go an that website.