Who is not Zahlenfetischist and emphasis on any hundredths, which makes the Cruzial CT256MX100 guarantees nothing wrong !! I have, after I eh need an SSD for our second Compi, twice allowed myself a new so large. Eben the aforementioned crutial CT256MX100. The relocation of the system from the old to the new 120GB large was not a problem. Unfortunately for me did not work the included Acronis, the system did not boot. After a trial with Paragon then everything went 1A. That KLANN only be an exception, usually Acronis's fine. I can only say that I am fully satisfied with the speed. Loading my Win7 goes whoosh the wupp, the programs run directly after the jump. And that is what I expect from an SSD. Whether and how much the MB are now in the second, I do not know and I do not even care less. As long as the running as fast I am happy (and I do for a long time around with computers and add my claims already !!) everything is OK. And when the SSD is everything OK !!! You do not necessarily spend 20 or 50 euros more, the Cruzial tuts full !! Strong buy recommendation !!!!!!