Just installed a Momentus XT 500GB Hybrid on my Macbook Pro 13". Well kinda liking it if compare to previous WD Scorpio Blue 500GB.

During my WD Scorpio Blue time, I am facing some lagging when running some applications (eg. Safari). The mouse cursor is turning for 20-30 sec. before the app runs. Look around and found out that I am not the only person having this problem. (macforum)

Then decided to give a try to Momentus XT. A bit costly in compare to WD but the performance is kinda fast. Well, a bit hot comparing to WD but no more lagging. (which is why i bought Mac in the first place).

Hope this give you all some reviews on Momentus XT.