Tech Report is currently doing a long term test of various SSD's, and the predecessor to the EVO (the 840 Series) is included . Their test drive started throwing errors after 100TB of writes, and after 500TB of writes it has lost about 2.5GB of its overprovisioning. Keep in mind that on average only 5% of what we do with a storage drive is writes. Almost everything is reads... and reads don't bring wear to an SSD. Given the performance of the EVO drives, their cost offers some pretty nice value.
http://techreport.com/review/25889/the-ssd-endurance-experiment-500tb-update
