I think it is all pot luck..and often down to the areas.
I had sky 2 yars in cotswolds..and was over the moon.
We brought the contract over to Portsmouth and it was also brilliant,,I luved it..till Parker saw a special offer with virgin..tv..phone..broadband all for £30 along with a free mobile phone (extra £10 a month for calls).
Oddly enuff changing to virgin has causd my pc more cut off problems ..
I wish I was still with sky!!
Before that i had BT and never had any problems..
its all a case of trial and error..and move next door to a reception ariel!!!
We miss you Nommie..so get back to us when u can.
The SKY is your limit!!!