I like Polycharger. Right now, on my car I have two coats of Wolfgang DGPS, both coats were added with Polycharger CH2. I am not crazy about the DGPS durability but I really like the look so Polycharger is my solution for that.
I also Polycharge my Blackfire Deep Gloss Spray Sealant with H20 Polycharger (1 dose per 4oz). I always have two ready-to-use bottles on my shelf, one is Polycharged and one is non-Polycharged. When I go for the Polycharged version, during my next car wash I seem to notice such amazing water beading and sheeting compared to using the non-Polycharged BF Spray Sealant.
But who knows, BF Deep Gloss Spray Sealant is already "Boosted by Polycharger" so perhaps adding Polycharger H20 to the formula does absolutely nothing to enhance the durability.
I don't notice anything when it comes to the shine, though.