I agree, I just switched the original 500GB HDD by Hitachi for a Crucial BX100 500GB and it runs buttery smooth, also what's important Crucial lets you download an image file to burn onto a CD and create a bootable CD to update the firmware of the SSD without having to plug the SSD to a PC computer (most SSD manufacturers would not allow Mac OS users to update firmware via Mac OS, they only give you a handful of software options for PCs running Windows). I am super happy with mine, shall my optical drive fail I'll simply get a data doubler and pop in the original 500GB HDD for additional storage (it'll stay in the box until then). Have fun fixing!