My experience is with the RemoraPro only. I was very satisfied with it until I received Dan's skimmer - total difference in skimmate production!
So, my comments would be: It worked OK for my 75 but definately not great, it is VERY noisy in comparison - especially after a few months when the plastic components warp. Bubbles in the upper chanber are usually on the larger side - that said, it either produces a small amount of thick skimmate, or a large amount of thin wet skimmate.