If it works for you go for it.
Like I told DogRescuer, one of my jobs is writing reviews for
NEW products. I guess I could write reviews for existing products but that's a full time job in and of itself.
I think if you look back far enough in the blogosphere you'll see I wrote article about polishing glass with Meguiar's #4 Heavy Cut Cleaner in the year 2005.
Glass Polishing... deep cleaning
The point I made back then was the abrasive technology used in the #4 was CHUNKY. It is this CHUNKY characteristic that enables the abrasives to CUT through the road film, water spots and any films on the inside of glass to remove it.
And again, UNLIKE ONLY USING A LIQUID SPRAY ON CONVENTIONAL GLASS CLEANER - a POLISH will not only cut through the really stubborn films but the films it cuts through will MIX into the polish residue where you will then wipe the whole mess off. As in getting everything off the glass.
THEN use a conventional spray on glass cleaner for the final cleaning.
The only issue I can see with Meguiar's Ultimate Compound is that UNLIKE the old #4 the abrasive technology in UC is NOT chunky. In fact this compound, like many compounds feels like a skin lotion, not an abrasive.
Sometimes newer isn't better.
Just sayin...
But if it works for you that's all that matters.