Semi-weighted? Those keys never felt semi-weighted to me. I've always thought they felt like a typical PSR, but just box style keys instead with a very short throw to bottom out (again common in the PSR line).
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.