ROCCAT Isku FX Review @ Vortez
 

Through the use of Easy-Shift the Isku FX has a frankly ridiculous 36 macro buttons available, including three specifically for the thumb, and unlocks the potential of the Kone XTD, Pure and [+] by allowing activation of Easy-Shift mode on those devices. At its core however it remains a membrane-based keyboard, and so must be judge in the understanding of the strengths and weaknesses of this particular switch type.

http://www.vortez.net/review.php?id=703