Indeed, the last three movements are excellent, with the best finale I've yet to encounter. It's not just that Stenz's finale is fast. In addition to being on the generally quick side (with lots of tempo contrasts), Stenz takes the final peroration - located near the end of the symphony - incredibly slow and with lots of deep bells AND cowbells (you can hear them both). In other words, he 'gets it' that Mahler 7 dumps you on the doorstep of Mahler's life-affirming 8th symphony. He also 'gets it' that Mahler is making fun of himself and the entire turn-of-the-century aesthetic.
I also like Stenz's scherzo quite a bit too . It us fast, but he also keeps the dynamics soft except at the climaxes (which he really brings out). Very well done.