I don't think you can buy or use Garmin Pilot in Europe.
You might like to try PocketFMS. There is a free 30 day trial.
All of Europe (and most other areas) is covered with reliable data. Proper (graphical) NOTAM briefings, weather included by professional aviation weather forecasters, 3D vision mode, pc planning etc etc.
The Android app is still in development but coming along quickly, with new features being added every 2-3 weeks or so.
It's available from the Google Play store.
For clarity, I'm part of the Beta Crew, but I've no financial involvement...just a very happy user since 2004