@ Maria....To give you some idea how Poznan changed, modernised, whatever word you use, this indicates something.
In our 1999 trip the Mrs wanted to go to Poznan as a day trip, I didn't, ie, doing a day trip from Berlin where we were staying in a Pension. So, the Mrs decided to go by herself.
I spent the day back in Potsdam instead.
The next time in Poznan was in 2005 when we had to change at Poznan train station (we had ca hour) to transfer to Torun as we had taken the train from Berlin to Poznan.
The marked difference in that station was what it offered in terms of an eatery. In 2005 there was a KFC in Poznan central station.
The Mrs said in 1999 that KFC didn't exist in the station.