What you pay is what you get!
Well, Google Analytics is very generous. It's just that what you save by getting it for free, you have to invest in educating yourself.
I have seen many sites that would be strong and useful in the SERPS, but are trashed because they think they need to collect analytics from 6 different services. I have brought most of my A/B testing server side, because the site loads so fast, the A/B flicker affects the A/B test results.