P21S 100% was my go to wax since it came out. Before that P21S Concours was my go to wax. In the past year I've gotten heavily into detailing and have wanted to try other waxes just to try them out. 100% is an excellent wax, especially on light colors. IMHO it gives a nice glow. I always use
It on top of a sealant. It's a no nonsense wax. No scent or colors.
It's pretty easy to apply and remove, but not as easy as Concours p21s or Fuzion. Really when your dealing with LSPs of this quality, most of the prep will make the difference. I wax frequently, so I can't comment on the longevity. A somewhat similar wax I like is Zymol Glasur. That is costlier and a tad easier to apply and remove. It's an oilier wax.
However, I would really reccomend Fuzion also. It's the easiest thing to apply and remove and also gives a great glow. You can't go wrong with any of these. The applicator that comes with 100% may be the best there is. The top foam of it absorbs nothing, making it very easy to clean and only absorbing very little product.