This is my second one. Haven't had any problems. The one I'm using now is Crossover 27QD-P. I bought it because it pivots, ironically it doesn't work when pivoted on my older model macbook pro. However, it worked perfectly on a similar (slightly newer) macbook pro so the problem seems to be with my laptop. Make sure you have the correct connectors, I had a buy a displayport-dual-linkdvi adapter from monoprice.
