Negative

At first, one, as I said, a stable notes / Text folder panel, left me the same, yesterday, on 01/24/2014, during an appearance without any "warning".
Is to say, the screw, so the clamp parts, turn out to be highly unstable short: I fell all at once from desk !!
Can mainly point out not own "Ton-text book" !!
No, an ordinary text book.

Was very disappointed with this incident and during the gig !!

Then assisted the lost panel forced on to the keyboard.
So no stars, of such poor quality.