But I have never seen them popular around the crypto community, a lack of marketing strategy I suppose.
The few times I have seen them mentioned here it was about not happy with it.
It's a pretty decent exchange to be honest. Most of their volume is generated on the BTC/GBP pair, after that it's the BTC/EUR pair being the most popular. From the looks it's focused on Europeans mostly. Good thing is that they stick to the core principles of what has value in this space, but that obviously makes them less popular in the grand scheme of things.
They only have BTC and LTC to trade with;
https://coinmarketcap.com/exchanges/coinsbank/