I was in Poznań 2 year ago and I liked this city. It is so unique city, full of monuments and very nice people. I accommodated there in Ikar Hotel - Hotele Wam Group. There are good prices and comfortable rooms . http://hotelewam.co.uk/621-hotel-ikar-poznan.html
Poznan is well worth a visit if only to see the historic market square ringed by colourful buildings. Many of the buildings have been reconstructed after damage in World War II>
Lovely historic town with two campsites - though only one has a bus link into town. Can be difficult to navigate across in rush hour traffic, but great if you don't need to drive and coincide your trip with one of the medieaval festivals
Its pleasant pedestrian streets culminate in the Stary Rynek (Old Market Square). The square has plenty of museums, but I preferred gawking at the pastel-colored buildings, which looked particularly great with the dashes of white cumulus clouds and snow. At the heart of the square is the elegant sixteenth century Town Hall, which the Germans ran for centuries. Poznań flourished because it is strategically located between Warsaw and Berlin—a perfect pit stop for a merchant.