The Pro: I've been performing with the Monolith since 11/2001 and agree: Great stand ! The things I like most about it are:
1) absolutely NO keyboard stand bounce !

2) ez to access foot pedals because there are no cross beams to get in the way.

3) folds completely flat. I transport mine on the floor of my car trunk, taking up no appreciatable space.

The only negative is that it's a little heavier

than I'd prefer, and I do miss having a mic boom add on attachement.

Here's a shot of me performing with the Monolith:
http://image2.pbase.com/u11/scottyee/upload/2660788.062102Gig3.jpg