I used this laptop. I am totally dissatisfied with this laptop. Because, I am unable to use my keyboard for my work sometimes. Because, sometimes my keys are not working. I am using on screen keyboard for my work. I did also some setting changes. It is again out of service period I have to pay Rs. 4000 for changing the keypad of my laptop. Which is very expenssive. Sound and display quality is good. But, again battery back up is also not good. Only one hour back up after fully charged. Service is good but expenssive with sony.