I have the set. For the money, it's definitely worth owning.
I have not yet listened to every disc in the box set, but can attest that the M6 and M9th are first rate. I really like this Mahler Sixth which is fast, thrilling, well played and recorded. It is actually among the best I've ever heard. The Ninth, OTOH, is quite slow but never dragging. Although it is slow, Tabakov integrates fast and slow parts really well; clocking at over 32 min. the first movt. is particularly fascinating in this regard. Timpani and other percussions are very powerful.
John,