IMO, P21S makes some of the best products but sheesh, their spray bottles are beyond horrible. The sprayers that come with TAW and the wheel cleaner dribble so bad that you get more product on the ground and dripping down your arm than on the car. By contrast, the spray bottles that my Pinnacle Crystal Mist came in are outstanding. Same for Zaino and all the Duragloss spray products. The 303 AP sprayer is also very good. What's with P21S? What are the best and worst you've experienced from other product lines?