We’d been using legacy banking for decades like everyone else and wanted something fresh. HSBC promised ‘connected banking’ which was full of promises but never happened. In the end, thanks to the demise of the Supercard-by-Travelex travel card & app (which was outstanding at the time), we discovered the MondoMonzo beta prepaid card. Used that for a while for travelling, then it became a proper current account, followed by a Joint Account in late 2018. We’ve been #fullmonzo since then.
During the last 6 years, the Monzo experience has grown and grown (Bills pots, Salary Sorting, Paid tiers, Trends reporting, Savings/Investments, Mortgage reporting, Cheque imaging 
, etc., etc.) and few banking services can compete at the #fullmonzo level so far for us 