Yeah, well I know when I moved from ADSL 2+ to Infinity 4 I was quoted the T&C though it was fast and the sales person was short of breath once they had finished.
I just asked what parts could make me worse off and they said price increase and options being removed, but they did say always let their customers know of the changes within a month before the changes etc.
One thing I have never been told especially on ADSL 2+ was the speeds I would and should get.
With Ultrafast 2 Plus I was told 330Mbps down and 50 Mbps up, no up to but a fixed speed, I did comment I will connect up at those speeds but in the evening it will become an up to that speed. She became confused, I goes either way I am fine with it.
When ever we become out of contract I just phone them and ask what's the best that they can do and if there is other ISP's that can do the same but cheaper I say so and most of the time they will match that price via a discount.
Paul