This is really a good choice, if you look for performance with a mid budget. I recommend this product. mine is lenovo z560 series. I am a bit disappointed bout the battery backup.. no issues.. you can opt for 9 cell battery.. mine is 6 cell battery. but make sure charge it fully before the initial use for the long life of battery.
I bought his product from reliance digital. compared to other stores, reliance gives it in comparatively cheap price.