I have purchased my laptop in sep 2012 and still using it.
The quality lenovo gave in their laptops is superb.
I am became fan of this.
Superb sound quality, Nice touch Pad, processor, speed of laptop every thing is very nice.
Currently I am running windows 7 in it, but before this I have used older windows version as well.
Worth investing in this.
Still after 6 years laptop condition is very nice and touch wood I never went to any service centre with any hardware issue of laptop.