After cloning kit installation SanDisk SDSSDCK-AAA-G27 SD system of my Dell Vostro 420, the latter who benefited from this SSD as a system disk, has found a new youth. Records time for the startup and stop of the machine (under 10 seconds), but especially access (2 to 5 seconds) and ultra fast operation of the programs I use, which can be heavy. In conclusion, total satisfaction for this purchase despite the high price of GB compared to that of standard SD.