Using a Windows version of the 2015 edition, and it's pretty damn nice. Honestly, I'm just waiting to see how the July update with Ubuntu tools for Windows 10 pans out. If it doesn't, I might just throw Linux onto this one. The only problem is that the Linux Edition of the laptops use slightly different hardware that's better supported by open drivers--in this case, the Linux version has an Intel wifi card as opposed to a Broadcomm one so as not to need a proprietary driver. That's definitely a concern if I do decide to throw Linux onto it, since this thing doesn't have an ethernet port.