I use it daily in Lyon. I like the notifications sent every morning to tell me which bus is the fastest, as my commute to work can be done in different ways.

The official app from the public transport network was revamped last month, and now copies a lot the UX of Citymapper[1], albeit with worse performance. The app use some weird caching system, and sometimes, even after refreshing twice, you don't get the correct timetable, and it's especially bad at reporting traffic alerts. Citymapper never failed me like this.

[1]: https://play.google.com/store/apps/details?id=com.micropole....