Mixpanel has helped us a lot, but not totally happy... Kiss seemed to have some things that Mixpanel doesn't and I still feel like Mixpanel doesn't provide 100% visibility into what's going on.
When i make new web apps i usually suggest we use mixpanel for tracking events. It seems cleaner than using google analytic events even though in the past 2 projects i built we used the later.<p>I also used kiss in the past.
Before I read this I wasn't entirely clear on the benefits of using mixpanel - I'm definitely going to look into using this in my own businesses and projects.