Hostel Zambrow 

We stayed one night in this hostel during a road trip through Poland and it was definitely a great choice for what we needed: easy to find, parking nearby, modern (the bathroom is more like in a 4 - 5 star hotel), very clean and with small but nicely furnished rooms, simple but good breakfast, great value for money. The only thing you have to know is that you have to call in order to get inside, as it is a very small hostel and on the first floor. There is the telephone number at the door and when we called, there was immediately someone who came downstairs. As in most parts of Poland, the staff does rarely speak English, but this was no problem.