There's so much here, I don't know where to begin.
Between this, his earlier single-piano set Minimal Piano Collection [Box Set], and the Ten Holt box(es) Simeon ten Holt: Complete Multiple Piano Works [Box Set], Jeroen van Veen has covered all the important landmarks of minimalist, proto-minimalist, and post-minimalist music for piano.
Of the pieces I've heard before, the recordings here are at least as good, if not better, than any other I have. The new two-piano recording of "Canto Ostinato" included here surpasses in many respects the 1996 Wieringa & de Haas disc, which for me had been the standard-bearer. It's an excellent Reich "Six Pianos," and a thrilling McPhee "Balinese Ceremonial Music." Everything is precise, yes, note-perfect, but never lacking in vitality.
More importantly, there's a huge amount of music here I'd never heard, by (mostly European) composers I'm now a huge fan of, like Eisenga and Meijering.
One could quibble with the decision to multitrack a lot of the multiple-piano works here, but I won't. I think it gives it a hot, tight sound, almost like progressive rock or electronica. Also, it adds to the mind-blowing awesomeness of this set to imagine one guy bringing it all to fruition on his own. Jeroen van Veen: hats off. You are a piano god.
Absolutely required listening for any fan of minimalism; arguably also of interest to IDM enthusiasts.