The single biggest bottleneck in modern systems is indeed the traditional plattered hard drive, and using an SSD in your system will make such a difference that you'll want to cry if faced with having to use an HDD afterwards. No exaggeration, the...

TRIM capable ; Good read & write performance ; Excellent customer service ; 120GB of space ; Good looks ; Simply amazing price

Performance doesn't stand out from other Sandforce drives ; Availability is next to nil here in Canada (you'll have to order from south of the border)

Please note that this conclusion has been modified on launch date after it became apparent that the actual retail price of the Mercury was