Lenovo has switched to a non-standard power connector; so if you want to upgrade this PC, you will need to swap the power supply (or purchase the expensive 450W one from Lenovo) and then add an adapter to get the pins right; not a big deal, but wish Lenovo would have stayed with the industry...
Fast processor; screams with an SSD installed
Uses a non-standard ATX motherboard connector which requires a new power supply and adapter for adding a faster graphics card