I owned the version before this one with the 4700U which developed a fault involving the wireless connectivity. Since there were none left I was offered a credit which I used to purchase this one which was cheaper but also faster. Works just like the one prior but definitely noticeably faster in my CAD work. Have yet to see any issues with the wireless connectivity, but here's hoping they fixed the issue in this newer model. PB wasn't sure if it was a network module or motherboard issue, and Lenovo isn't very forthcoming about the details on which one is inside. Otherwise it performs just as expected from before, really long battery life,...view more