The performance of the Brahms doesn't work for me. The horn player is first rate but seems to be playing it safe: the emotional range is narrow. The violin player is good, but, again, not much emotion. The pianist must have thought she needed to supply the passion the others lack. What comes across is so clatter-y and bang-y that I kept trying to tune the piano out and listen just to the violin and horn. Not a satisfactory musical experience.
Although the Brahms is the headliner here my primary interest was in the the arrangement of the Mozart quintet for trio with the piano replacing the lower 3 string instruments.
It works well; the players sound more comfortable in Mozart's narrower emotional environment. Here the pianist takes an accompaniment role and at the lower dynamic her playing is quite lovely. With the horn and violin at the fore, though, the piece sounds more like a double sonata rather than a trio of equals.
There are several better recordings of the Brahms horn trio starting with A. Brain, A. Busch and R. Serkin on EMI. My favorite of the moment is Horn Trio Op 40 / Serenade Op 11 performed by members of the Czech Nonet on Praga. Both those performances - the Serenade is the original nonet version - are emotionally charged, gritty (but not ugly at all) tangy and deeply satisfying. Great sound, too.