Guys, I am extremely very happy about this product(ACER-Aspire 4720Z), I am using this product since 2008 Jan, Its performance is very good, I can restart and shutdown this system within 2 minutes, Battery performance is upto 50min(in 2008, it was around 65 minutes). It is heavy in weight, no other disadvantages.
I recommend ACER company to check / review components used for this lap to improve your other product sales.