I have been using as my only machine a T530 uninterrupted (think 10h/day uptime) since Nov 2012, both as a desktop replacement and to carry it around. I had to replace its motherboard recently but it was my fault as I put it in too enclosed of a space and overheated/burned it. Aside from a bit of fan noise, it's still going strong. It's definitely underspecced wtr to graphics nowadays, but still able to run things like League of Legends smoothly with just the integrated chip. Happy to answer questions about it if anyone is interested.