It's really a fantastic recording. One of the best sounding ever, in my opinion. To be honest, I didn't need or want another Mahler 4 (and who really does?), but this makes for an excellent start to the cycle and gives me hope for future releases.
To clarify, I think Mahler 4 has been the luckiest of his symphonies on record. It's the only symphony that I feel completely satisfied by with a number of recordings. I don't think any other Mahler symphony has recordings that I am absolutely 100% satisfied by, and that hit every single mark for me.
This Bychkov M4 is one of those that satisfies me completely, as do probably 7 more recordings of this work.