Delighted with this purchase. An excellent SSD to install the operating system (60 GB version).

Most:
+ Stable SSD for eight months, so good.
+ Very fast (it outperforms a Kingston V300, which is nevertheless a very good SSD, too).
+ Newest SSD in Kingston.
+ Quality Controller (LSI SandForce). This is one of the most important points in choosing an SSD.
Cons:
- Support Kingston Europe is in England. That said, it is very responsive to questions.
- The Kingston quality: what is it for this product? (I just return their two USB keys)
The V300 is a proven model (but slower). However, after eight months of use,
no problem (I have a 60 GB model KC300 and another 180 GB).
Except for a few times a time freeze problem to boot another Windows 8.1 (64-bit)
but this is not due to the SSD itself: here the updated Intel drivers for the motherboard (chipset, RST, ...)
updating the SSD firmware (which took place easily) - in case - and off
fast boot (in the energy management part) of the Control Panel Windows solved this nagging worry.
Apart Kingston, I would venture to buy only Samsung SSD or Plextor.
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* Updated to 09/13/2014: my two KC300 SSD always work very well and quickly.
By cons, regarding confidence in the Kingston brand, my confidence is blunt
these recent stories replacement by Toshiba NAND Micron NAND much slower
for the V300 model.