A friend of mine has lived with an unreliable and slow ADSL connection for many years, finally he is looking at his RBI options. He is located near Waikanae.

I know nothing about the subject so I thought I'd ask here for recommendations.

He would potentially use a decent amount of data (if his connection was better). Any other traps like CG-NAT with certain ISPs etc?

I seem to recall some discussion about two antennas vs one or something?