Gary Reber is very particular and if a product does not perform, he will let you know: http://darbeevision.com/assets/documents/Darblet_Review_Gary_Reber_July_Aug_2012.pdf
As I stated I'm not attacking Darbee. And his opinion doesn't really relate to my comparisons on my equipment... configured using various options such as Detail Enhance. I remember way back when (in '09) Pioneer Blu-ray players had a similar feature (Detail something or another) and everyone dismissed it as image pumping and I found it as in improvement.
I also tried Darbee on my 61" set via my HTPC. If the video card was set to Adaptive Contrast anything the Darbee applied was pretty much over the top. If I disabled it in the card and told the set to to do Dynamic Contrast 2 or 3 (up to 4 levels) again whatever Darbee applied was over the top... approaching torch mode. If I keep both disabled I would appreciate Darbee. Again, I'm not saying it isn't a great tool... I simply think other tools offer similar advantages... without side effects as well such as ringing.