I would give the Lenovo T440s a 5 out of 5 if it were not for the trackpad. The rest of the computer is rock solid and really a great setup. The keyboard is my favorite because of the feel of the keys, the sound the keys make, and the keys’ apparent ruggedness. With the tweaks below, it makes the trackpad bearable though it still could use improvement. I assume that you are using Ubuntu 14.