Now running Windows 10 on my work PC and my home workstation. Just need to upgrade the Media Center PC in the front now. The wife and kid seem happy enough with Windows 7, so I'll likely not upgrade them for the foreseeable future. Opted for an in-place upgrade and everything went surprisingly smoothly. Activation servers are slammed so I'm not activated yet, and if you have GeForce Expirience and existing nvidia drivers installed it might freak out when Win10 tries to install it's own, but this is easy enough to fix. Otherwise smoothest, fastest upgrade on a Win box ever.