Honestly, I wish they made the Pantone Huey still. I have had issues with my Datacolor Spyder Pro, even on a normal gamut monitor. When I re-calibrate my monitor it usually takes me several times to get a good calibration. The reason I know that it isn't calibrating correctly is that I have an image of a white/black/grey card and there are times where the black will appear redish or greenish. It usually takes me two/three times to calibrate correctly.
With my old Pantone Huey it would be one and done. But, since they stopped the updates on the software, I had to move to the Spyder Pro system. Once the system is calibrated though, it keeps the calibration fairly well, the only time I regret it is when I have re-calibrate it every two weeks - month.
My two cents.