This has been discussed at length, have a little search around, put your feet up and enjoy the threads! 😉
People seem to like the idea of bundles, but not the idea of higher rates outside the confines of those bundles. Folks seem quick to highlight O2 as a great company for the free data bundle - but forget the high call charges outside the bundle.
That may not have been clear - but you get my gist 🙂
I think bundles are something GG are looking at, but the PAYG flagship is still to be perfected and developed.
Having said all that: "perfection does not exist - only the evolution towards it" - Enzo Ferrari