I wouldn't be worried about this as per those tests,SSD should last this and much more

Please have look on those threds

http://www.anandtech.com/show/6459/samsung-ssd-840-testing-the-endurance-of-tlc-nand

http://www.tweaktown.com/articles/5196/samsung-840-ssd-storage-endurance-testing-tlc-to-the-end/index3.html

http://www.vojcik.net/samsung-ssd-840-endurance-destruct-test/

I've bought few months ago Samsung 840 PRO SSD and my SSD already written 3.58TB,if I'm worried no

 

Thanks,Jura