I've used AvalonKing on two cars and have been extraordinarily happy with the results. It's cheap ($70 or so), and I can verify it lasts 3 years even when parked outside.
It added tons of gloss to my black 2019 vw gti, and has made my alpine white e90 shine much more. It also beads water away and is slightly less dirty.
Is it easier to clean? Maybe, but a dirty car is a dirty car. It doesn't really stop that. In my opinion, the effect is that it makes the clean car look better.
Additionally, even a complete noob can install it and it only takes a few hours. Highly highly reccomend!
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