An internet connection must always be available for it to be any use. What good is an inactive network connection when you have work to do or want to make an WWW query. It is always worth paying for reliability and quality. I have been with Zen for years and they have always been excellent, reliable and consistent.
We have just upgraded to fibre to cabinet service and the speed is now amazing. We get over 60 Mbs download and over 8 upload. With 3 heavy computer users in the house this is fantastic, but I wonder if we will exceed the 100 Gbyte month limit I selected.
I have only had to call their customer service dept a few times over the years we have been with them and cannot fault them. They actually know what they are talking about and talk to you as an adult - none of this "switch the equipment off and on" stuff that they know everyone will have already tried before calling them.
They are to be unreservedly recommended.