Looking for Totango and Gainsight Experience (Implemented and Used both)

Looking for insights from folks with experience who have run Gainsight and Totango in mid to enterprise space.   I hear many organizations go back and forth with technology decisions in the CS Platform space and I am very interested in hearing PoV from those folks with that experience.    Of course I have the mindset that swapping technology is often not the solution to core underlying process, people, data issues and while there may be marginal differences in feature / functionality in the technology, overlaying technology is often not the problem.