I’m a believer in things being instant and the 60 seconds could prove impractical for me, however, if I did have all my money and banking with Chase it would be instant.
Hopefully not long before they can join CASS, I’d probably drop my Starling account to be honest, it’s ok for a bit but very limited and frustrating in functionality and everything a bit all over the place.
I’ve just started a Santander to Halifax switch for the bonus and the Halifax app doesn’t seem too bad at all, and it’s blue 
I’m an ex Lloyds employee and found the Lloyds app awful. Not too dissimilar to Halifax, but it was overcrowded and too many buttons visible all the time, and it was green 