Price sensitivity and the different choices that now exist in the Analytics industry. I think it makes sense for us sometime this year to rethink our analytics strategy to see how we may leverage the best of GA (which has included lots of new features and updates the past years_, Kiss and other tools as need be.
Start off with Google Analytics and then over time if budget and further learning is allowed build out KISSmetrics.
Start off with the basics. GA will give all the core basics. Over time when GA becomes too vague and you want to follow people versus just a number... upgrade to KISS or Mixpanel. Depending on your budget, go with Mixpanel since it's free up to some x number of events. KISSmetrics however will charge you up front after 14 days.
Mixpanel, Google Analytics. When we were making the decision, KISSMetrics was more mature and they had comprehensive documentation that allowed us to quickly pick out features we needed. I think we really wanted a way to import our data and the time it didn't seem like Mixpanel could do that. At the end of the day, we decided to go with KISSmetrics and Google Analytics (free).
No - The online documentation and us fiddling around with the tool was good enough. Granted we did have issues originally with the data import. We contacted the support during our free trial and they were responsive within 2 days.
We would have integrated with Salesforce which KISSmetrics supports
Since we are using Sugar CRM it would have required some time for us to integrate this. We expect to do this in the near future. We don't see any issues to integration, it's just not right out of the box by KISS and other tools. So it's going to have to be an investment on our end.