My advice is, save your self the hassle and don't buy it. Unless you really want it, because, I must admit it does look cool, but....
It has the vaguest Installation guide ever, it has 3-pin connectors for your fans, which are probably 4-pin. It does not fit in the drive bay, if you were to mount it with screws (i read another guys review on that, cuz i have an a-top xblade case with easy slide drive bays). On my A-top Xblade case, the only possible way to fit it is buy inserting it through the inside, wich is extremely hard.
If you are to get any Cool Drive, I suggest Cool Drive 6, I was just at coolermaster.com and looked at its manual...and it actually has very useful things called...DIAGRAMS!, as well as EXPLANATIONS!. Even though, in my opinion the Cool Drive 4 look better, i'd imagine that 6 is more user friendly.
I just bought a Cool Drive 4 today, and tried to install it....but Now I am going to take it back tomorrow.