Pianoteq in Sunday Sounds App

Does anyone use Pianoteq in the Sunday Sounds for iPad?  How do you like it?  What piano do you use?  I’m considering jumping over to Pianoteq for my piano sounds and would love any real world experience with using it live in a church context. 

I’m currently using The Grandeur form Native Instruments in MainStage but I want to go iPad for my next rig because MacBook Pros are stupid expensive now.