I do like all Gyeon products -4 microfibre squares included - was a little tricky to get used to the application. I did not use the dropper and just dropped it from bottle only squares. Have to wrap around the sponge to apply - trying not to use too much - used squares folded to get into smaller parts of alloys, lug holes etc. I used about half the bottle for 4 wheels inside and out - wheels look very good - will be interesting to see how long it lasts and what the wheel cleaning will be like. I just had my wheels refurbished so are like new - will look at Q2 repel for windscreen next.