I went to Sky4U for the Ryanair APS MCC. The training was really good and the instructors were all RYR pilots. The S4U team really went above and beyond to cater to our needs and to help us whenever we had any difficulties. After I finished the training, I've uploaded my documents with CAE and they called me 2 days later to schedule the interview which happened about a week and a half after the phone call. Passed the interview in Dublin and will start type in July.
The simulator in Dublin is exactly the same as the one Sky4U is using.
sky4u_berlin and
Ryanairrecruitment can confirm that.
I really recommend Sky4U for their professionalism, dedication and work they put in. For me it was the best training experience so far.