Mixpanel is very useful because it allows to have real time insights about our customers, it is very easy to send push notification with it and for our IT team to install our events on the tool. Moreover the customer service is very efficient, they always answered rapidly to any of my doubts and the helped me to overcome every issue with their platform.
It is not a very user-friendly platform to use, it needs some times before I learnt to use it well. There are still some things which are very difficult for me, as using JQL to write queries (I'm a marketer, not an engineer).
There are some properties we cannot use as we would like to, for example the birthday property, we cannot select a day on the calendar, moreover the insights we receive are not as precise as they are on our own platform.
We managed to schedule push notification, while before we couldn't do that, moreover we managed to have some real time insights about our customer and to better segment them.