Lorraine B W.wrote a review of Nikwax Tech Wash on December 12, 2012
Familiarity: I've used it once or twice and have initial impressions
I used this to wash my London Fog trench before using the Cotton Proof (see my review there). I had never proofed my trench so I figured it needed a good wash and proofing. The combination of the Tech Wash and Cotton Proof worked awesomely for me. So I am not sure how well this would have worked alone, but for my purposes, it did the trick.