I am using Sony Vaio laptop since 2013. At my exprience, I can explain about this that is very excellent. The Laptop is smoothly functioning since I am using the Laptop and It never hanged during this period. Battery charges in my laptop still not exhusted in short time. 2Gb RAM inbuild, 64 bit Operating system, Intel( R) Celeron( R) CPU in this laptop. Sound system and picture quality also very fine. I like sony Vaio Laptop.