Paul T.wrote a review of Nikwax Tech Wash and TX Direct Wash-In Duo-Pack - 300mL on October 29, 2013
Familiarity: I've put it through the wringer
Follow the instructions, washing first is important. It doesn't have to be like new but you have to wash out any spills, hand grease, or anything else that has built up on your coat. I've used the wash in and the spray on many times. Both work very good, but you can do multiple coats w/ the spray on. In really wet weather the multiple coats of the spray on will give you the best waterproofing for your coat. The wash in can be used once w/ one or two garments and must be used all at once. The spray on does about 2-3 garments, and you have a lot more control. You can apply heavier in areas like the cuffs, shoulders, etc.