i tried it over the Christmas hols and am very pleased with the result. used approx 200ml each of the rejuvenator and cleaner (e46 coupe). massaged rejuvenator with hand into seat as demonstrated by Chay and left car under sun for 4 hrs. kept it an hour longer than recommended since a little cloudy that day. the amount of dirt on cloth when using cleaner is surprising bcos i clean my car seats once a month with turtlewax leather cleaner and conditioner. there wasn't any noticeable dirt on the cloth the last time i cleaned the seats a month ago. also remembered to follow Chay's advice on changing new cloth once dirty. leather feels new after treatment, ie. doesn't have that shiny look, feels more supple and bum no longer slides around easily on seat. good stuff.