I suspected that these were a wee bit hyped, like so much else in the vaping world.
Got one for one of my PT2s yesterday. Ok, I am convinced! I am using my PT2 again, and it's better than ever.
Now to buy one for my second PT2, one for my SO's PT2, and one for the PT2 of a friend while I'm at it. I don't normally throw things away, but the original bases are going in the trash.
Cons: Makes the PT2 about 5 mm longer. Doesn't sit perfectly flush on my mod.
Pros: Makes the PT2 awesomely vapable.
I am never going to buy a topper without air flow control again, except maybe another PT2 mini if my current one breaks, because they rock.