I have 2 pc changed the drive with a SSD Samsung evo and it's going great.
big plus of this pc the back cover. 4 screws to undo and you arrive at your cpu, memory, hard drive and fan.
there is a free memory location to pass above 4giga if necessary.
Battery autonomy 2h30 to 3 hours depending on use
Install Windows 7 64 bit - driver supplied on dvd