I'm stuck at home so thought I'd give an update. (as if you need one!)
Using Vision for 4th week. I will persevere and keep using it for a while because when I changed to wfp it took a while to master.
My findings so far:
Brush does glide a little easier.
Bubbles annoy me, they move down the window slower than running water so if they hold dirt, and often they do, it slows to a stop on the window requiring further rinsing than usual making me slower not quicker.
It does appear to be cleaning sills a little better than just pure water, but I'm not sure if it's just me hoping it does.
It does not leave the glass with a better shine than pure water, in my opinion so far.
It does not remove snail trails any quicker.
It does not remove bird muck easier or quicker.
It does not change beading glass to sheeting glass.
I'm not trying to rubbish the product, I will continue to use it a while longer. But I'm not easily swept along by heresay or miracle cures from travelling medicine men. Just telling it how it is.