Never heard a bad thing about them.
It's not a 'decentralised exchange', and thank goodness for it, because that wouldn't make any sense.
Did I miss something?
There are already other decentralized exchanges. How is Bisq different?
Currently no other project fits our definition of a decentralized bitcoin-to-fiat exchange. Open Bazaar stands alone in mirroring Bisq’s principles, but they’re a full market place, not a specialized currency exchange. Most exchanges claiming to be decentralized are either not supporting fiat exchange or operate with a server architecture and do not fit our definition. And of course there are a lot of ICO projects with whitepapers but they have not proven yet that they can deliver any working software.
To be properly decentralized, one must avoid single points of failure:
*Bisq does not hold any bitcoins. All are held in multisignature addresses rather than a Bisq-controlled wallet.
*Bisq does not hold any national currency. National currency is transferred directly from one trader to the other.
*Bisq uses a Peer-to-Peer network over Tor. This means there are no servers to be hacked or DDoS’d.
*Bisq does not know the traders. No data is stored on who trades with whom.
*Bisq does not require registration. This means privacy is maintained, there are no “approval” wait times, and identity theft becomes impossible.
*Bisq is not a company. It is an open source project organized as a Decentralized Autonomous Organization (DAO).
From: https://bisq.network/faq/#How_is_Bisq_different