TLC huh. This is ok if you're doing mostly reads, but if you're using this for a write-heave application, make sure you understand the longevity limitations of TLC flash storage.
It is a concern, but not nearly as bad as some make it out to be:
For a 500GB drive, you also gain some more life over the 128 and 250 GB models. On the flip side, if you plan to do a lot of data transfers on this drive, it might not be the best option.