I would say the bulk of them as that's what's caused to most issues in the last year and a half.
However, to be fair here(even though many think I'm just an overly biased fanboy, lol).. I would say that the newest Indilinx based drives firmware has not provided a stellar start to their new Indilinx banner.
The newest firmware has certainly helped quite a bit.. but time and firsthand experience will be the best ruler to judge these things rather than the flamers or fanboys opinions.
Personally.. I think they(OCZ) are making a huge mistake by not providing a means of destructive flashing these newest drives should something not agree with them and they decide to panic lock you out. Nothing fuels a fire more than users being forced to spend their hard earned money to RMA a drive that was supposed to be plug and play in the first place.
Had they released that original Indilinx d-flash long ago.. they would have saved quite a bit of money and face in that matter. When a user of your hardware is forced to RMA 2 or 3 times in a row?.. you can often lose them as customers forever and they will slander your name for months or even years from then to further compound the loss of sales and concerns for your products durability.
Seems that the powers that be over there are more concerned about losing new sales because of existing drive owners being able to update their old drives to the Martini firmware, rather than the RMA costs involved with replacing the ones who lock them up. Pretty sad, to say the least.