The comfort of the keys is good, touch is nice, the QWERTY keyboard is a little shifted but it is not too annoying (except for those who type type machine). I do not find it noisy, contrary to some reviews, I experienced much worse.
There is a USB connector and audio jack (input + output), but they're just reminders connection, indeed we must connect the keyboard on the rear terminals of the PC (via the supplied cable) to benefit from it, which makes sense . As the back of the PC jack sockets are often taken under other thing you have, there must be a jack to double T (it works well in audio output). It is still good practice to avoid plunging 4 legged behind his PC to connect headphones.
Finally: the keys on the side are configurable but programming is accessible only installing the software Mad Catz download on their website (no CD is delivered). This programming is not easy to understand at first and nothing is explained nowhere, but is in fact, these are only the keys sets of shortcuts. You can create profiles based games (some are already available on the site done everything but actually seem empty ....).
Unfortunately severely negative: often it crashes on my PC (no key settings is no longer active but the keyboard is OK), I have to restart the disconnects. No way to upgrade its firmware, you feel helpless, brief the galley. In addition I broke one leg to lift (not solid ...). I think I'll go out the window.
In short, a little disappointed, a purchase not too bad for the price, but Limiting Quality, prefer a little bit more and you will have a quality that makes the difference.