DO NOT buy a dell XPS 15. The performance is great and the computer looks and feels nice, however, if you use a docking station the bios gets screwed up on charging watts from 130W allocated on the charger to 5W. This is the huge inconveince as the computer WILL DIE if using plugged in. Spent hours with support and services and they could not fix. They even sent an expert to my house and replaced the motherboard, seems a waste. Get it together DELL.