Alright...I did have a careful look at the effect of the Vision on Resolution and Y/C delay.
As far as I can tell... the Vision has no detrimental effect on those, better it can help solve Y/C delay problems.
I enlisted my 2 young kids (arguably with much better eyesight than I) to double check that what I saw was no figment of my imagination nor the result of too many hours spend staring at CTR monitors..
On the resolution side, as I stated before, the 6.75 MHz pattern of the AVIA 200 TVL test pattern was clearly visible. Vertical resolution extended well beyond the 500 mark. My conclusion is that the Vision does not affect the resolution of your sources.
On the Y/C delay side, the Vision has what they call the "Chroma Phase" adjustment , which essentially helps you get rid of the problem. I used the Y/C delay test pattern from both the Avia and Video Essential DVD's. For both DVD players I used, I ended up setting the CPHASE to 3. The resulting pattern was almost perfect.. with, maybe, just a very small red delay...I needed to have my nose on the screen to see it...but the kids did agree with me. I could be that having smaller steps for that setting would help?
Since both DVD players I used required the same amount of calibration and since I do not have any reference, I can not tell where the delay actually occurs, but the flexibility of the Vision makes this a non issue.
I do have a problem with the Vision... but it will be of no concern to most of you. The top (yes only the top) of the PAL image from my Satellite receiver is seriously cropped. I feel increasingly confident that this is not a setup problem.
As Jon put it, the Vision is a "tweaker's delight" and so far I am very please with my decision to buy one (even with the cropping mentioned above). At its current price (USD 999), it is indeed good value.
Just my 2 cents,