I agree with the others.
If you are considering a Plextor ssd, then you might want to take a look at the M5 Pro instead of the M5S. Intel and Crucial are also worth considering.
I maintain the ssd database listed in the sticky at the very top of this forum section. Here is the link:http://www.johnnylucky.org/data-storage/ssd-database.html
Scroll down to the brands and models you are interested in and follow the links to the technical reviews.