Lots of failures:
http://www.briskoda.net/forums/topic/266114-18tsi-and-20tsi-engine-failures/Time will tell whether Gen 3 and the 7 have the same issues.
There are a lot of EA888 Engines (quote APR):
Gen 1 Trans Version 1 - Bosch HPFP (US A3 platform vehicles)
Gen 1 Trans Version 2 - Hitachi HPFP (ROW A3 Platform Vehicles)
Gen 2 Trans Version 3 - Hitachi HPFP, No primary oxygen sensor (ROW Cheap A3 platform vehicles)
Gen 2 Trans Version 1 - Hitachi HPFP, Valve Lift, No MAF (New TT's only)
Gen 2 Long Version 1 - Hitachi HPFP, Valve Lift (A4 Platform Vehicles)
Gen 2 Long Version 2 - Hitachi HPFP, E85 Sensor, Metal Intake Manifold with 5th injector (Some new A4 platform vehicles)
There are differences between all of these engines too, including some depending on model year such as compression, pistons, rods, etc.
Gen 3:
All get the new head integrated manifold. Different designs depending on model.
All have no MAF.
Transverse and Longitudinal designs.
Bosch vs Hitachi HPFP.
Turbo exits on driver or passenger side.
Several different turbos depending on model.
Different Intake Manifolds.
Direct Injection and Direct Injection with Port Injection too.