Simple, fast and fair rates. Banks just do not know how to do this.
I have always had an issue with established players in consumer finance and FX (I worked in FX and money markets for years so I know how badly corporates and consumers are treated with regard to market rates). Transferwise is a no brainer . . . if you have a business, get all your FX going through Transferwise.
To reply as a company, please log in to your business account.