Well Demus chose to use modern instruments there - that is enough to put me off the set. I also heard (from trustworthy reviewers) that the interpretations are rather lacklustre as well. So I am glad to have the "meine Klara" disc, whether it actually sounds like two projects or not -- two rather different-sounding fp's were used anyway.
I like several recordings on Winter & Winter (Schumann, Brahms, Schubert) and, in general, the work of Lorenzo Ghielmi in that label.
But my opinions are slightly different about other issues.
I clearly prefer music on period instruments, but they are mandatory for me just in Baroque music or earlier.
I too can enjoy music of the Classical and Romantic periods on modern instruments, especially when that repertory has been covered very partially for HIP performers and ensembles. I would prefer a good HIP recording in Schumann's piano works, but who has recorded those discs? If I don't hear that music on modern instruments, I would not hear it at all (with the exception of the Staier’s disc
A tribute to Bach and something more).
And, as you know, period instruments don't guarantee artistic quality or pleasure. For example, I dislike Beethoven piano sonatas by Brautigam, although I like his Haydn. And I like his Haydn as much as I love the Haydn recordings by Brendel.
On the other hand, when I buy a box set (as the Schumann set on Nuova Era) I don't assess it as a complete thing, but every disc in particular. And the aforementioned set has four o five very recommendable discs and its general level is rather good, giving the opportunity to know some obscure pieces. IMO, Demus (a renowned performer and collector of old keyboard instruments) is a serious artist, who knows very deeply his Schumann. I would not recommend his complete set just for one reason: It is an excessively “qualified” recommendation in many aspects: sound, approach, instrument, etc. It is the typical matter of personal taste.
Finally, if I mentioned the Nuova Era set was only because the fortepiano pedal pieces are played by two pianists and the name of Shetler was omitted in the credits.