That website does not encourage me to try. It's so bland, and uninformative. Its done in a consumer marketing style that is not suitbale for B2B. And really doesn't give me a feel for anything they do better than any of a bunch of alternate options. If it is a good product they should really re-think how they sell this.
Nothing beats segment.com imho. Their API's, SDK 's and documentation are superb.
Don't they aggregate the data that a real web analytics company would track (mixpanel and kissmetrics are on their free tier). I wouldn't call Segment a 'web analytics' company but they are very useful.
This is a very broad question. What is your primary goal(s) you are trying to achieve?