"I actually have the P500 but my understanding is that it is the same as this Z500. This is the sleekest, lightest, most powerful, sturdiest laptop for this price I have ever purchased since I started using laptops. I was amazed at the design. I owned a Lenovo laptop in 2011 that had a beautiful design but was heavy and terribly slow for some reason. It had an i5 processor, but it was still super slow. Lenovo - you have definitely done what it takes to meet and exceed my needs and expectations for speed, load as well as design I have been looking for in a laptop. The other company I was stuck on buying just does not meet my expectations with design. There are a few quirks and flaws with this laptop, but I have learned to deal with them so far. I'm not sure if it is the new Windows 8 or the laptop itself. I will address them in feedback for Windows 8 and on your website to see which is which. It could also be that I have not learned to fully use the new format for Windows 8. Overall, I am definitely satisfied with the P500 that I have. If feels so solid when I pick it up. There is none of the bending and weakness of the frame that I have experienced from previous laptops. It feels as if I am picking up a slab of marble when I pick it up. I have not experienced any lag when I have multiple programs open at the same time. When I plug into a USB port, I get instant response. The only thing I wish about the USB ports is that there was at least one on the rear of the unit rather than all on the sides. But, I have learned to be flexible for that because I know all companies are not the same. No major complaints on performance so far Lenovo. Thank you for manufacturing such a stellar innovative laptop. Unless your quality changes, I probably won't ever buy another brand again."