I recently bought a t14 with a 4750u. Ubuntu worked great out of the box, but the battery lasted about 4 hours. I don't know if it was a hardware issue, but I tried everything and couldn't get it to last more than 5 hours. Everything else was great though. I was running Rust compiles on large projects without a sound from the fan, and it stayed cool throughout. Sucks that I had to return it because of the battery.