I put Darbee in a similar category to Audyssey.
You can measure the results before and after and prove there is flattening with sweeps and that is valid, although I do not believe that tells the whole story.
The same is true for video, I use the less aggressive HD settings and max out at about 30%.
If you are running test patterns, do one could argue that Darbee is more accurate to the source.
But depending on your display and source, it may in fact produce a result that looks better.
For example, contrast enhancement could look better on a low contrast display or during daytime viewing.
Especially, if the enhancement restores apparent contrast that is lost.
Much the same way that THX bright-room looks better during the daytime in a bright room that a movie mode.
Since I am stickler for accuracy, I would rather put my money into a better display.
If you want it for TV, and have a lot of sources, an outboard unit might make more sense.
They are popular, so if you do not like it, you can always sell at a decent price.
- Rich