I recently decided to switch to Sky fibre broadband (from TalkTalk ADSL), given the cash-back offer from Sky, and the upcoming price hikes from TalkTalk.

So far, so bad! My line was supposed to go live on Wednesday. Instead, I find a leaflet at my door that my line could not be switched on because BT openreach needed access to my house, and to ring Sky to make another appointment.

This is despite Sky explicitly stating no access to my house should be needed. I rang Sky the same evening (40min in the queue) to be told it was to late to make an appointment, the department wasn't working at that time, I'd get a call back early the next day.
No call next morning, so I called again at 3pm. Same story, except this time the person on the other end did raise the appropriate issue in their system (that apparently hadn't happened the previous day), and I was promised a call back before the end of the day from the department that can offer me a new appointment (apparently, that department is not connected to the call centre).
No callback.
Today, I ring again (another day, another queue). This time I am being told my request is hanging in the technical department, and that the customer service representative from the previous day was entirely wrong to promise me a same-day call back, the technical department has a backlog of three working days, and I shouldn't expect a call back until Wednesday next week to finally make that appointment. No estimate of how long it will take between actually making an appointment, and getting one! So I'm looking at at least a week's delay until I can even make another appointment, let alone have my broadband connection working.

Appalling customer service, is all I can say. Let's see if they can get it set up at all. I'm not sure the savings with be worth the hassle... I will definitely be asking to be refunded for the week(s) I didn't actually have any broadband service.