
As a mathematician, I like that the site provides me with data I can reason about analytically rather than going by feelings or reasoning. No other competitor provides me with such a good view of the data. Review collected by and hosted on G2.com.
It's a bit expensive, but I imagine acquiring that data is a tremendous amount of work and needs connections that I don't have, so the value, in the end, is not that bad. Review collected by and hosted on G2.com.