I tried two versions of Vision due to the reported experiences of fellow windies. Better sheeting, more sparkle on the windows, whiter UPVC etc.
I didn't get problems with it clogging my system as I use a trolley and 25L barrels and I always got excellent mixing as I put it in each barrel before I filled them.
However, I just didn't get the results everyone else said they were getting. I don't know why, but pretty much all I experienced were a few bubbles and a pleasant smell which like another poster said stuck around ages after I stopped using it. It did not make the UPVC frames any whiter or make any appreciable difference to my cleaning, either of the windows or the frames.
I get the idea of trying to make a good thing even better but so far I've found it hard to beat Pure water, a good brush and a good flow rate. I'm currently loving the Xtreme flocked sill brush from Gardiners. It's been great on snail trails.