No, not Zen.... although I would happily recommend them too ! Their product and support is also in the first-class category. My home backup line is with them, and I know many others with them too. Their contract is not as good though because it's BT based, not LLU.
Service I was referring to is Easynet On-Net LLU DSL.
Yes, Sky bought Easynet. But the service and support offerings are chalk and cheese...... home-users get the usual spec broadband via Sky, business users get the quality contract (and priority on the network).
About the same cost as the top-of-the-range Zen service ..... roughly £70 per month before any discounts. Well worth it though if you use your line for business purposes or are a heavy internet user.