Just to add on to that (which you can get from reading the article at AnandTech.com), the issue is the TLC NAND memory the 840 EVO uses. After an extended period of time, the charge on the memory decreases, which causes the drive to repeatedly try and "recover" the data. The data isn't lost, it just slows read times. It's probably not a speed decrease you'd ever notice on your BDP-2, but the instability in general concerns me personally.
The "fix" that Samsung is coming up with occasionally rewrites memory cells to maintain the proper charge.
If you are considering a SSD drive, I'd consider one that does not use TLC NAND, such as the Samsung 850 EVO or Pro.