QUOTE(Ayshah @ Jan 18 2012, 07:03 PM)
... My OH also plays several brass instruments (as well as rock climbing) said it certainly was not detrimental to his fingering. Indeed using this on a 2 hour train journey he would arrive ready for the gig with his fingers quite warmed up.
Having been a brass player (French horn, tenor horn) and pianist both - I found that the horn fingering is much "cruder" in a way than piano because it requires much less fine control. Not trying to be offensive in any way! I just couldn't think of a more descriptive term. Basically to play horn "all I had to do" in terms of fingering was move my fingers up and down vertically (just at a different angle for French horn than tenor horn, the latter is much closer to trumpet hand position). For piano, I have to move my hand around in much more different ways.
Point of my waffle is, I could see how the finger exerciser could be not detrimental to a brass player in terms of fingering but not help a pianist and in fact possibly hinder him/her. But I haven't tried it, so I can't specifically say.