While I was pleasantly surprised with Flips ADSL2+ bandwidth after years on a heavily shared Slingshot connection, I had constant issues with echo on my landline. It got so bad at times that it was hard to speak. It was very audible in the ear part of the phone and I would estimate was a delay time of around 50 milliseconds. (I know this from years of mucking around with a digital delay box for music processing, and it sort of becomes an innate sense.)
I'm very pleased to report that my Vodafone landline is clear,crisp, and with little to zero audible echo. As an added bonus Internet speeds are great including at peak times. I'm wired to an exchange (on a multi-pair copper cable) not a cabinet which probably helps, although this was the same under flip. Also I think I'm on the "Red Network" infrastructure.
I'll miss Flips usually very helpful and responsive customer services and helpdesk, and excellent voicecall pricing though the deal I have with Vodafone easily matches my minimal spend with Flip. I'm a pretty low data user and don't download pirated content, or use p2p services anymore. I don't think I will ever get through my 40 GB pack, as I live alone... I mention this because it would be nice to pay even less for a smaller data pack. Just a thought.
One thing I am disappointed with however is that Vodafone have apparently shelved their Talk 0 plan for voice calls. This used to be standard years ago when I lived with my parents and we were with ihug/vodafone. Also I'm not sure what plan I'm on for the call portion but they no longer seem to have capped calls at $2 for 2 hours to cellphones. I need to decide on a calling plan.
I'm also unhappy that apparently there is no connection billing portal such as flip have for logging into and easily seeing your credit or what is owing not to mention configuring credit card payments or direct debit. I don't have or use a smartphone currently so an app for that is not an option. Also when the bill has not been paid (which I missed once recently as I had not set up regular payments) the connection stops entirely with a redirect to a captive portal screen. I had been expecting a slowdown in speed instead. I use vodafone webmail which was also blocked by this, so could not read the email I received about the bill and how to make payments.
I hope this is constructive feedback for both companies mentioned above.