Completely agree - I have a couple of dozen of these and no reliability or performance issues (all with the firmware upgrade).
My vote for "worst SSD" would go to some of the OCZ drives, or any drive with a Sandforce controller. However, I've been exclusively Samsung Pro and EVO drives for many years - so buying Samsung has kept me away from whatever crap might be out there.
Haha! True, I may have overstated that somewhat. OCZ clearly wins that prize.
However, the 840 EVO ‘fix’ was more of a hack than a fix really...
https://www.anandtech.com/show/9196/samsung-releases-second-840-evo-fix
“Ultimately Samsung’s second fix is a bit of a brute force solution to the problem, but at this point there doesn’t seem to be anything Samsung can do about 19nm TLC cell charge decay other than to refresh the data, as the problem is intrinsic to the NAND itself.”
Sure, this works but it’s not ideal, and performance on a single unit I have is still not what it should be despite running this latest firmware.
More importantly, the 840 (non EVO) is also affected and never got a fix until many years later.
This includes the ton of mSATA drives shipped by Dell which, again, we’re very late to get a fix.
The 840 was released in October 2012 and the eventual ‘fix’ arrived in June 2016. A joke.
https://www.techspot.com/article/997-samsung-ssd-read-performance-degradation/
Needless to say, I would very much hesitate to actively encourage someone to go out and buy an 840 off eBay