The Nine Saver is a SHAM. They state that "In your first year you will save x" What they dont tell you is that this is just a sweetheart deal to Lure you in - after that first year after you have moved over to the latest offer they INCREASE your rate. So you have wasted your time going in to find out then you switch and only to end up in the same situation.
I found the best way to go was to approach my current provider tell them that I have a better offer and ask if they would be willing to match it. I did a better deal doing this than what was on offer with the 9 Saver. and it is ongoing