Hi friends , Let me tell you about my experience with this laptop . I have bought this acer aspire 4720Z on the recommendation of my brother . He said it was very good in performance . But when I got this laptop it looks pretty much good. But after sometime, I mean 5-6months after the performance of this laptop reduced and it starts hanging every time. When this laptop starts it takes more time to get started and finally when after 3-4min when it starts then for sometime I have to give him free for 1 min otherwise it will get hang . So this was my review on the acer Aspire 4720Z . Thanks