hmmmmm at the risk of being labelled fanboy on coolaid or a monzo sheep - which really is quite insulting 
Good FX rate when abroad on POS transactions with no fees from Monzo
Good FX when abroad up to £200 ATM withdrawals with no fees from Monzo
Overdrafts - I was offered one yesterday
An opt in to overdrafts rather than a notification that you’ve gone into your overdraft and this is our fee
Probably number 1 for me - A feed that lets you track and monitor and potentially change your spending habits if you want to
A search function to trace your spending
Attaching receipts to your spending
Fairly good in app customer support
More transparency and engagement from the staff than most other banks
do I want to see more features - yes of course I do, are they seemingly taking ages to implement - yes they are as Ive said previously on the forum
Im sure other fanboys could add more to the list