25-key Ultra-slim USB Controller Keyboard with Full Velocity Sensitivity, Polyphonic Aftertouch, Full-size Keys, and Class-compliant USB Connectivity for Most Music Creation Applications - OS X, Windows, and iOS
Features
I had a Nanokey. It was pretty useless. I got an Akai LPK now and it's a much better solution for some easy mobile keys. I would also check out the CME Xkey 25. Works with iOS devices and has after touch.
...RTL Utility. Studio One actually overestimates the RTL. Note the 7.98 ms estimate of instrument latency. The keyboard is a CME Xkey 25 USB keyboard. Subjectively it's the most responsive keyboard I've ever played, but this is due to mechanical design. Rather than pivoting keys they are kind of like the stabilized space bar on...
...OB-X8 is a €5500 device that doesn't have poly aftertouch. Whereas the €300 Microfreak or the €120 CME XKey 25 do have that!!! Outrage!!!!!
Ah well. There must surely be other features that make both devices worthwhile?