We reviewed Google's tool and because of the algo it uses you need to run tests forever to get statistically relevant data to make decisions.
We're going to go with visual website optimizer to start with, only 1000/mth for the sort of traffic we're dealing with and no long term contracts. When we need more we'll revisit some of the more expensive and robust tools.
I was under the impression that it's directly proportionate to the number of variants you are testing, which you would scale proportionate to your traffic profile. How does Google's algorithm differs to that of Visual Website Optimizer's?
Would love to hear how you find the package you are going with after a couple of months of use. If you don't mind, could you post your thoughts when you get a chance.