It is a great product for a smaller team to integrate into their app to start getting some in-depth analytics. The web interface is a great analytics tool without the need for writing SQL. Lack of Unity support makes it a lesser choice for mobile gaming. Like many third-party products, once data needs become substantial, the business will likely outgrow Localytics and will move towards an in-house solution.
The biggest thing I would like to see with Localytics is the capability for more correlations. The limited amount of correlations available does restrict the type of analyses that could be done with the data.
An easier interface to move data into Microsoft Excel would be very useful, rather than creating annoying workarounds.
More/better automatically scheduled reporting, as well as an Excel plug-in to access the data rather than being restricted to the Localytics interface.
It would take several weeks to hear back from the billing team. It took 3 months to resolve an invoice last year. Their technical support is very responsive. I would typically get a response in under 24 hrs.