Listened to this recording two times over the weekend and found it very disappointing. Initially I thought Fischer would do very good, to great work with this symphony. Instead he recorded a very bland, uninteresting Mahler 7. The first movement lacks any kind of intensity, tension or drive. It also comes across as very controlled. Nachtmusik I is well played, but lacks character and is much too quick for my tastes. The scherzo and 2nd nachtmusik are the best parts of the recording. Fischer seems to hit his stride here. His quicker tempos work much better. It also seems like he's letting his orchestra play, instead of trying to control them; this is a big problem with the first movement. The finale is pretty good, and he gives us the 'light of day' but again, I never felt like he really unleashed the orchestra and let them go for it.
Overall, this is more 'positive' Mahler. I like Mahler like this, but this recording lacks passion, drive and tension. It reminds me of Zinman, without the great musicality and architecture.