Setup google apps for work email

Hi all,

I have a google apps for work account and I've been raking my brains on the best way to setup the email account. Can someone please tell me whether it's:

1. best to setup the email as an exchange account - I find the exchange email push delivery is really instantaneous


2. best to setup it up as an IMAP Idle push account - where the push not almost as intantaneous as above


3. best to use the stupid Gmail app - not a fan of it per se

I'd really like to put this topic to rest and settle in for 1 method...

Oh btw, I have a samsung S6 edge running 5.1.1...