Microsoft’s Kin devices will forever be known for their incredibly short shelf life. They debuted in early 2010 and the Redmond company killed them a mere 48 days later. An internal Microsoft video obtained by Wired suggests some folks inside of Microsoft knew what consumers would later find out about the Kin phones — that they were duds. You can check out the internal videos below and chuckle as the testers give their honest opinion on the devices. Not surprisingly, the most common word used in the video is lag and the overall responses are overwhelmingly negative.