I've only compared the Samsung against a Crucial MX100 500 gb SSD, and noticed absolutely no difference in performance. It was in a second MacBook Pro that is in my recording studio, so it is an apples to apples comparison. My online research shows the Samsung to be the best in it's class, but in the real world, any of the SSD's is a vast improvement over a standard hard drive. Samsung has the best warranty, 5 years, if I recall correctly.