Hi Carlos,
We've had mixed results with the mobile app. It seems to function much better/faster when using it with LF cloud, even with a sizeable bandwidth setup on self hosted systems.
There are little things in the app that are annoying which you'll encounter. For example in a form, if you have a drop down list field type, linked to a database it becomes a scroll wheel in the app, which for large datasets can be annoying as you're scrolling forever. You'll need to use a single line field with a type ahead DB lookup setup in that scenario.
Overall the app is good, but fairly basic. For most of our mobile app users, they just use the web client in a browser on the mobile device as it's much more feature rich.
Hope this helps!