Well, the keys feel very good, very responsive, but last week after six nights in a row of four-plus hours each, my right wrist was telling me ENOUGH. Normally it isn't a problem, and after taking a few days off, last night was fine, no problem.
My point was that not all of us require, or even want, real piano action.
Since this thread started out being about the PA4X, I thought it was at least appropriate to mention it.