I had the old plaz bar & plate. Worked good back to back. Couldn't crack any more rwkw! Went to process west 3, yes I admit I don't like the looks of it as the end tanks are very small! But it's working better for me, better power and cooler IT's run after run. If going for looks plaz is the one! If wanting better flow process west is the way IMO The two are splitting hairs really. Sorry re read it aswell, I compared it with a process west 3 cooler!!!!!!! If looking at a pw2 cooler I would go the plaz cooler instead unless going a pw3