The thing is Vodafone is pretty new to this broadband thing and a lot of people on here would still be in contracts, you would really need to ask in a forum with more people on.
I know of someone who is on Vodafone broadband and they seem ok with it, they say it is no worse or better than any other large provider, but they do not like the router, but then they never like routers supplied by the ISP they prefer their own and Vodafone do not allow it.
Also the so called beam technology only really works with devices that are 802.11ac.
But as an ISP they say it is fine.
i keep being pestered by them as I use them for my mobile phone, i have tried to get them to stop, but they still pester me to use their broadband service. i am still in contract with plusnet and to be honest I am not sure if I will be Vodafone for their mobile network in a few months time never mind wanting to use their broadband service.
Desktop machine now powered by windows 8.1 pro 64bit, no dreaded metro, laptop by Linux