Yeah, on three SSD's that all had Indilinx controllers. Pieces of crud, never using those controllers again.
What? Have there been any reports of the memory controllers in SSDs going bad? In general, that would cause a total drive failure, not sporadic (and reproducible) read errors.
How do you know the memory controller failed versus something else? Since the controllers use RAM to track just about everything, if the RAM was unreliable in any way, you'd end up with total drive failure pretty much instantly.
There were a bunch of bad firmwares for those drives though - my original 2009 era drives are still going strong with the last *stable* firmware release from Supertalent and I beat the snot out of them in my daily desktop for years before retiring them to Xbox One duties.