I have one and use it for both wet and dry. It gets pricey since you have to keep buying the cloths.
A couple of weeks ago I was in Sears and they were having a demonstration of a swiffer type mop but you didn't have to throw awy the cloths. Simply remove from the cloth and throw it in the washer. What they use for cloths are those microfiber cloths. But their system was pricey.
So I got thinking
What if I bought the microfiber cloths and used that on my Swiffer handle.
You know what - it works.
No more cloths to throw out. And the microfiber clothes are easily bought at dollar stores
I now have a micro-swiffer