Well those aren't really issues with me regarding the QY-100. I like the size of the unit. The size of the buttons don't bother me. I can understand how it may bother some who have thicker fingers. The screen isn't an issue to me because my eyesight is fine, and it would be used in a well lit environment. I like the portability in the QY-100. I agree the QY-700 is a nice unit. It also has a great screen too, but I wanted something that wouldn't take much space, pack a good punch, and very portable.

Squeak
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GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.