Karczew - Gassy Ferry

Has anyone here tried the Karczew - Gassy ferry before? Any comments or feedback?

Here is a website with some info about this ferry service - in Polish.

karczew.pl/asp/pl_start.asp?typ=14&sub=35&menu=295&strona=1&prywatnosc=tak

Does it work in winter time too?

It doesn't say on the website whether it works in the winter too.