"Having used a karcher window vac for a number of years, I have been really fed up paying silly money for their little sachets of branded cleaner. This is a good product and works v well with the window vac. One bottle will last me a very long time. I really do recommend this product."
"I've managed to get through 5 decades of life without this product, thinking that streaky windows were the norm. Well that's over now. Used with a Karcher window vac, this concentrate made cleaning the windows on my house a breeze. One wash, one wipe per window, done. This is particularly useful for the outside of velux windows, where it is difficult to squeegee. And as others have said, an excellent fresh smell to boot. Best thing I've bought in ages."
"Only used once, but was really pleased with results. Windows were sparkling clear. You don't need to use much product each time so should last a while. Lot cheaper than a window cleaner. No more washing up liquid for me. Will definitely buy again,"
"Works great: leaves windows clean and streak free (that is, if you use a squeegee, and use it properly of course). Don't let the price put you off: you only need a small amount in a bucket, so the bottle will last ages."