I've been following this thread with interest, the Yamaha NP-30 has some very useful assests, ultra light, portable, convincing piano tone. I'd really like to hear some follow up comments from you guys who've been play testing this model. Squeak_D on another thread you mention a design flaw with this model? Hissing on some of the higher keys? Any one else noticed this? Is this maybe with battery useage, my personal interest is using the NP-30 in a Big Band set up where portability and storage can be a big issue. Feedback much appreciated.