In comparison to Meguiar's own #10 and #17, I can say without a doubt that Plastx smells a heck of a lot better!!! In terms of performance, this Meguiar's combo(#10 and #!7) has been my old stand by for reliability. I know that I can always count on them to do the job! BUT, along comes Plastx with its diminishing abrasives. I find that it does not quite equal the Meguiar's Combo, but it comes in at 95% as close!! Plus, it is only one step!!
The trick with using Plastx is in how it is worked in. Those diminishing abrasives need to be worked in very well!! I did one light by just wiping it on and wiping it off. The gloss was fine but the scratches remain. In that sense, I would have to give Plexus the nod if it was just a wipe on, wipe off type of product.
On the other light however, I really worked the Plastx in! The difference was remarkable!! The best part was the len's clarity and gloss!! In a way, Plastx reminds me of DACP in the way it needs to be worked in and broken down.
Overall, that Plastx is one of the best plastic cleaners around. If you want the absolute best IMHO, then Meguiar's combo of #10 and #17 would be on my list. If you want very close performance to that of the Meg's combo in a one step, then Plastx is it.