I bought the SSD along with a new laptop and of course immediately installed.
After I had previously installed already in other PCs SSDs, I already knew something about the pros and cons and was actually very pleased with the SSD Ultra Plus 256GB. I also have the few euros more output to instead of the regular model to acquire the Ultra Plus variant, because I, apart from faster write speed, also a slightly higher quality and stability expected me, as with many other products (such as CPUs) of case. Also, I'm really anyway usual high quality and stability of SanDisk.
This assumption simply confirmed to be false, one morning when I went to get my laptop from sleep and from my system (Fedora 18) first with a journal and a kernel panic error was welcomed. A reboot later laughed me "Device not found" contrary.
The SSD is no longer recognized by the system.
Of course, I immediately tried to clean the contacts, the SSD to try in other systems etc., of course, to no avail.
It is not even about the well-known "disease" of SSDs, ie a sudden failure of large quantities blocks, but a rough production error of SSD controller, as nowadays not really more likely to occur in appropriate stress tests by the manufacturer.
Fortunately, I tend to create backups of important data on my server, but this is not self-evident to many people, and if I had not done it, sometimes a big part of my lecture notes would now lost forever because the manufacturers never forgive warranty for data losses and a recovery is hugely expensive.
I'm now waiting for my replacement device (which I will get almost certainly not within the first 2 weeks until I need the laptop back) but frankly not a big trust more in the SSD and I wish would have again bought from another manufacturer.
Addendum of 30/04/2013:
I have received exchange about 2-3 weeks ago and installed the new SSD last weekend. This morning, at the university, also the replacement SSD adopted with the same error. I feel this is simply throwing as an imposition by SanDisk such an unreliable product on the market. Fortunately, I have the disk that I used as a substitute in the meantime, is not formatted, and therefore does not need to completely set up my new system, but the annoyance factor is there and the confidence in SanDisk SSDs now at zero.