Christian,
That is a "Do these shoes fit my feet" question. Only you can judge what the feel and response of the action is.

It is Yamaha's Balanced Hammer action w/Aftertouch (Montage). Yes it is designed to mimic the feel of an acoustic piano... It is not an acoustic piano, we build acoustic pianos, trust me we know what that is, this is an incredible simulation with a worldwide reputation - but like trying on a pair of shoes, only you can tell if it is a good fit. That's why it is important to play it, experience it for yourself. That will tell you everything you need to know.

This is the same Balanced Hammer action found on the Motif-series 88 note synthesizers, also on the S-series