In November I found Warsaw and rather grey and dull city. But I hear it is really nice during Spring and Summer. Not complaining though - I am used to it from back home. :)
But I do not think I will come back here unless something special happens here.
When it comes to eating, I did try the Polish dishes Pierogi (ok) and the fast food, Zapiekanka (also ok). Had I not been here alone, I would probably have tried some more fancy places with really good food, but I did not - and don't really miss it.
Total cost of this trip was about 7600 SEK (including Concert ticket @ 850 SEK).