[OCDP]

It won't overflow. The most damage it could cause is some foam leaks through the hole on the lid. I have never had an overflow.. it simply cannot happen. Wait for the pic so you'll better understand.

As for cleaning inside the actual skimmer.. I don't believe you can. Downside? Perhaps.. but I don't care.

They are super easy to remove from tight spaces... they are long in design, that's about it..

I don't know how they compare to prism's , but .. from what I've read, I am sure they would kick a prism's butt no problem.

I've been using mine for a long time, not one issue.. super easy to clean and maintain, and it's always pulling out nasties.

You won't be dissapointed!