I've bought tons of OCZ drives over the years. In my experience, you either get a good one, or a bad one. The good ones stay good, and the bad ones die quickly.
I've never had one fail after the warranty period was up, but I've had plenty fail within 2-3 months of purchase.
I'm not sure what their deal was, but in dealing with their support people and in general just hearing about how they operated, it sounded like they didn't actually know anything about how SSDs worked, but were just buying parts, "connecting the dots" on the schematic, and hoping for the best.
I'm not even convinced Sandforce knew how their own controller worked, until Intel figured it out for them (and had exclusivity on the fix).
I never tried any of the Indilinx drives. By the time those came around I was already soured on the reliability of OCZ products. Honestly I think they probably died because they tried too much to differentiate their products in the firmware, doing things that Sandforce probably told them would give unexpected results (like putting wait states in the state machine to slow drives down and sell them at a lower price point).
Who knows... now Toshiba can buy them and have some crappy SSDs to put in their crappy laptops.