I use the keyboard with my iMac and Logic Express, and also with my Windows laptop and Sibelius. With both computers it was simply a matter of plugging and playing, however with the laptop (being Windows) it is necessary to set it up in Sibelius every time I start up: however this only takes a few seconds.
The setup software provided does not work with Logic, however using Logic's 'Learn' feature I have set up the basic controls to start, stop, record etc. - this is probably all I need, as with the Garritan instruments I use the volume is controlled by the Mod wheel; as long as I can record modulation, pitch bend (and of course the notes!) all is well. Seems a pity to waste all the other knobs and sliders, maybe I will eventually find a use!
The keyboard transmits velocity very accurately and has 3 sensitivity settings. I have it plugged into my usb hub, which is not powered and has various other things attached, but this works fine.
Being quite small and light I can have it on my lap when sitting at my Mac, and if I wish to compose at my ease with the laptop can just stick it on the bed next to me!
I would give it 5 stars if the software worked with Logic. However, it does everything I want at the moment.