It looks too good to be true. I have never seen a polyprop cap of that capacity and voltage in that small package.
If you look at
this other item they make you will see it is about the same size but only 80uF.
For that type of capacitor that is the normal power to capacity to size ratio.
The one you link is about the same size but has the expectations of an electrolytic capacitor.
So you are pioneering.
They are cheap, but tread carefully.
With regard to polyprops as a whole, they don't sound bad at all in most implementations.
"Two things are infinite, the universe and human stupidity, and I am not yet completely sure about the universe." – Albert Einstein
