If this is your first LCD, it may be a matter of getting used to how things look on an LCD, especially since the pixel-pitch on that display is not quite as good as some of their other models. (.282 vs .270).
Make sure you have font anti-aliasing turned on, as this makes a big difference in the readability of text. In Windows it's called Clear Type, and the settings can be accessed from Control Panel. Exact location depends on the version of Windows you're running; newer versions even have a Clear Type tuner wizard you can run through to optimize the Clear Type settings for your display characteristics and personal preferences. If you were previously running with a CRT Clear Type may be turned off since it's not really needed for CRT's. MacOS probably has something similar, but I don't know the details.