I need reliability with my broadband and not high contention and drop outs,i have not tried Sky for Broadband but the few people i know that have haven't had many good things to say about the service.
I can't say anything but good things about the Sky Broadband service I get - I am pretty fussy as a general rule, and when I took Sky BB I only took my original line because it was completely free inc line rental at the time, so I figured I'd see how it was, and if it sucked, I'd just provision a line via my work as normal.
However... the reality is that Sky has provided me with utterly reliable broadband service, it "just works", it's able to reach the full 80/20 service provided, as I get the full sync and do regularly push it to the limit.
I'm also a Sky TV customer - Sky Q would hopefully address some of my long standing irritations - the inability today to have a programme recorded on any box played anywhere in the house is a reason I wouldn't have Multi-Room, and instead end up with mostly fine solutions like Slingplayer.
A lot of what Sky Q is supposedly going to offer I have no interest in, but there are a few bits I do and I will certainly look to end up with it. With any luck the set top box might be more reliable than the current HD 2TB box.