This is an outstanding performance of two wonderful works by Franz Schubert.
For the Arpeggione Sonata, Nicolas Deletaille uses a newly-built arpeggione instrument to obtain the unique sound and timbre that is very different from a regular cello (of which he is a contemporary master: see Deletaille's incredible recordings of the Bach Suites and the Beethoven Cello Sonatas). I disagree with another reviewer who brings up an out-of-print 1974 recording by Klaus Storck and Alfons Kontarsky to compare to this one (and does not mention a more recent 2006 recording by Gerhart Darmstadt and Egino Klepper). Every recording has its own validity, and the marketplace is not exactly awash with authentic recordings of this small masterpiece. Furthermore, any recent project that is fortunate enough to enlist the collaboration of the legendary Schubertian Paul Badura-Skoda -- still in top form as an octogenarian -- is to be treasured.
Now, the great String Quintet here gets one of its finest modern readings. Deletaille plays an 1865 Nicolas François Vuillaume cello in an admirable collaboration with the Rosamonde Quartet. Their interpretation is warm, poignant, and powerful at the proper moments, and the recorded sound is splendid. I totally concur with music reviewer William Norris who, writing in [...], describes the "filler" on this CD as arguably the main piece: "The sense of ensemble is palpable throughout, spawning endless moments of admiration. Listen out for the probing desperation of the third movement's Trio, and the magical, distant reminisces of the opening movement in the final Allegretto. An account of such poignancy and depth - aided by a warm, glowing sound."
By the way, the major independent classical labels in Europe now use a high-class cardboard and plastic case with inserted booklet (e.g. Accent, Bayer, Channel Classics, Harmonia Mundi, Lyrinx, Zig-zag Territoires), just like Fuga Libera does for this recording.