Study / Polish language classes in Poland, advice needed! [7]

Hi, members of the forum!

I am thinking about learning polish in Poland this summer for about 2 months. I have done some research on possible Polish language schools through the Internet but there are just way too many! So I have narrowed down to the language schools in the tri-city area (Gdańsk, Gdynia and Sopot). Has anyone on this forum had experience or had dealt with the language schools in this area?

BTW, are the polish courses in Poland taught in English? or German? or possibly Russian?

Thanks a lot.