My two cents about UWW+...
I've been using UWW+ over a year now and I always seem to find a way to incorporate into every wash. At first I didn't like it because I was mainly using it as a quick detailer and it was streaking a lot on me. I found out that I had the wrong dilution ratios combined with old/cheap microfibers. After using it at waterless wash strength with fresh WW MF towels, it behaved so much better (understatement).
I figured I'd share my main personal uses for UWW+ in order from most commonly used as to least commonly used as:
Rubbish remover - I always keep some handy to remove dead bugs, bird bombs, race track grime, race paint, rubber, exhaust soot, etc.
Drying aid - I prime my WW MF towels with one or two sprays at WW strength. I find it really helps in case you missed a spot washing or want some extra gloss.
Final wipe / inspection spray - It works wonders for lifting polish residue without marring or when buffing off tough LSP's.
Waterless wash - When I'm in a pinch and I need to clean my whole car in 15mins or less, this product enables me to do it safely!
Clay lube - I use it at WW strength and use a secondary spray bottle of water to adjust the ratio on the fly
Pad primer - one spray on a new pad does the trick
Quick detailer - occasionally I'll use it to quickly detail some spots in between weekly washes
I don't do rinseless washes as I prefer 2 bucket method (4 buckets in my case + a foam lance pre-soak) or if I'm pressed for time waterless wash. I kind of feel like rinseless washing is half way in between my two extremes, but I have adopted the rinseless practice of changing my wash media (up to 5 different mitts) after each area (roof/windows, upper doors, hood/rear hatch, bumpers/rockers, and wheels). This actually sped up my wash considerably by allowing me to just reach for a new mitt each time and toss the used ones into a hot water bucket to soak until washed.
At the end of the day my weekly wash process is dictated by the state of the LSP's coating the various surfaces/textures and the weather forecast (I don't use 5 mitts to wash if it's raining tomorrow).
All in all great product and review.