I ordered one of these for my mom, it came in and everything was good. The unit was packed with an airbag around it. Inside was clean. Installed all the latest updates with no problems. Since it worked well, I decided to order me one, it came from a different vendor, packed well, but upon opening the box, it reeked of a strong odor, like cigarette smoke. First thing I noticed, 1 of the slot covers on the back was missing, figured I better look inside to be sure it wasn't laying across the circuit board, it wasn't, but then I saw where they just used 1 screw to attach the hard drive to the bracket, vs using the appropriate adapter like in the 1st one ordered. The smell dissipated quickly, and all worked well.  So just know, these units come from different places, some do a better job at refurbishing them. The 1st unit got a 5 star, this one gets a 3 star. It's easy for me to see how the ratings can vary since I ordered 2 and saw the difference. Also, the 1st one ordered came with a DVD RW, the second one only came with a DVD ROM. I had to spend 20.00 to buy an RW, and I will have to buy a hard drive adaptor to properly install the hard drive. The ratings are not quite fair, since you may be rating different vendors!