Windows 8 is a product which has got a mixed response from the time it was launched. Microsoft changed the look and feel of their OSs by the launch of this product. Microsoft gave a retro look to the windows 8 and made the it more colorful and cool.
Windows 8 is made in such a way that it can be used with the touch based displays. Also it is not limited to notebook and desktops but also for tablets and mobiles. The UI is tiled based and all you see are in tiles. You can click on the tiles and that specific application is launched. Windows 8 loads pretty fast than its predecessors.
Also Microsoft gives lots of apps on their app store. Also they give timely updates to the users.The only problem with this OS is that it doesnt have the start button. But Microsoft is going to provide the start button in the new launch of windows 8.1. But we will have to wait for that.
To conclude, This is a good OS and those who are OK with not having the start button and those who love the metro look of the OS, then this is a go go OS.