Digging up an ancient thread... I got one of these a month ago and have been using it daily since then. I love it. It's huge. It's beautiful. But, two caveats.

1) OS X 10.9 can't wake it up properly from sleep. OS X 10.11 works better but is still sometimes wonky about wakeup.

2) I used an Xrite Colormunki calibrator so the screen would run at the standard(-ish) D65 whitepoint, and thus have colors that look like they're "supposed" to look. The native whitepoint is way, way more blue than this, so after calibration, the brightness dropped. A lot. If you've got light text on a dark background, you'll be annoyed at the reflections of your desk, or of whatever is behind you. (This contrasts with the Apple 27" Thunderbolt display, which puts out such a torrent of bright light that it can overpower anything.)