I wanted to provide my experience with the PRO settings in case it could help others.
Disclaimer: I want to point out this is my experience on my 55" VT30 so not saying in anyway this will be what others have or will experience. With this said, below is my experience.
I finally decided to try the D-nice settings for my MJ beginning s/n display since others have posted very positive results. I did this Wednesday night so wanted to wait until I viewed several more hours of HD content last night to make sure my thoughts haven't changed.
Once I had all the settings entered, I decided to switch back and forth between the Custom and THX modes since I've been using THX for watching all content. The HD movie of the first Lord of the Rings was ON while I did this. It was on the scene when they were underground fighting the Orcs, with the Elves and later in the final chapters in the woods. Maybe it was the luck of being on the darker scenes in the beginning that I noticed a definite BLUE push to the PQ. The colors of the cloths with leather, blue and red were more realistic in THX mode even though I like the added detail in the background probably due to the higher setting on the brightness and contrast in Custom mode.
For the heck of it and not knowing what it would do, I decided to change the BLUE on the 10 IRE setting from -4 to -50 (max negative). I was really surprised to see how much the PQ improved. So much so, the definite BLUE push looked to be gone. The PQ in Custom now to my eyes looked better than THX for the very first time since I've owned my display. I watched many different HD channels and noticed there was too much color so I changed the Color setting from 36 to 33. Everything looked really pretty darn good at this point but I felt maybe there was slightly too much RED. I went to the same 10 IRE setting and changed the RED more negative. It was originally set to -5. Last night, I made final tweaks to the BLUE and RED under the 10 IRE line. I ended up with the BLUE at -23 and the RED at -17 with the Color at 33 and all other settings including all PRO settings remaining the same.
I know there are many IRE levels, 20 through 100 actually besides the 10 IRE. I'm not a professional calibrator obviously so didn't want to mess with those. I simply decided to change the two I mentioned under the 10 IRE to see how it would help the BLUE push I was noticing.
I watched several hours of HD content last night including normal HD news and other normal HD viewing besides various movies, cable HD and STARZ. I was really impressed with the settings especially the skin tones which is most critical of all colors. It might be hard to tell if a car is not the true red it should be but pretty easy to see if faces look accurate or not. I am really please with the overall improvement. The original THX setting at times has a slight YELLOW push to the colors especially on facial skin tones via various programming. It is a little hard to see but more obvious especially after having the Custom mode set up. The facial skin tones now look so accurate that I can see all the details in the faces. Definitely leaving me in a better place to enjoy my 55" VT30 even more.
Anyway I thought I would post if others are wondering where to put the PRO settings. The PQ is clearly better to my eyes than THX which I thought was darn good for a provided setting. Clearly the new Custom setting is easily good enough PQ until I get my display calibrated. Seems such an improvement that I'm not in a hurry while waiting to see how Gotchaa reports back regarding the code testing. Maybe Panasonic will or won't address the color / luminous issue. If not, I'll have my display calibrated once I get more hours on it. Easy to wait and see how this pans out.