Based on her track record (f’r’instance: winning the German Music Competition in '98, the Open Goldberg Variations recordings), I expect this project to be anything but mediocre. Sylvestre is a very good producer, the studio is excellent, the instrument will be grand (heh-heh), and it’s great to see names like Parma and Naxos involved. IOW, your previous complaint that, “[f]ree and open is fine, but good performances and recordings is arguably is more important” seems to be answered here.
(Plus the intangibles – plucky husband-and-wife team composed of a Drupal code warrior and a prize-winning petite powerlifting pianist.)