I've recently switched from standard Sky broadband to Vodafone Superfast fibre.

If you are looking to change be aware of these important points;-

** The main 'issue' is that, unlike most other ISP's, they force you to use their Vodafone Connect router. It's a terrible router which grinds to a halt when you have more than a handful of things operating. (Do a search for 'Vodafone router problems' and see for yourself).
** This router is 'locked down' and they don't provide the admin details in order to make many technical changes
** Despite achieving the stated minimum speeds, which should be twice as fast as Sky, there is significantly more latency, buffering & drop outs occurring when streaming movies and even viewing images on Facebook!
** I have a multi-room media server which should connect to the router via an ethernet cable -- it simply won't work with the Vodafone Connect router...

In summary, the headline speed is not the only thing to consider!