I just replaced the Seagate 500GB 5400rpm / min which team my new Asus S200E by Samsung SSD 840 250GB version. I was well documented myself on the net before dismantling the netbook and yet, the Samsung program to clone my HDD (Samsung Data Migration Tool 4.0 Windows compatible 8) did not work for me and planted after 3min. I had to buy additional software (Paragon Migrate OS to SSD 3) to 15 and then, more concern, 150GB copied to the SSD 90min via the SATA / USB interface provided in the kit. I withdraw a star for this reason. For the rest, RAS: once inserted into the belly of the ASUS netbook, the SDS Windows 8 boots with phenomenal speed (8 seconds), each app opens with improved reactivity by a factor of 5 or 7. The hard drive is no longer the weak link in the config and the entire system is now high performance (beyond my needs). Note that the 250GB SDD, does more than 233GB once formatted and even 209 GB by activating the OverProvisioning, which I understand is optional in the case of the 840 that manages the OP in the 6 GB "masked" between 250 and 256GB. Finally, note that the SDS consumes less than 5400rpm HDD / min of last generation and offer my ASUS S200E about 30 minutes of additional run.