The space was perfect for our needs. We were two couples and each had our bedroom (with a king size bed) and bath. The living and kitchen areas were nice sized. We cooked a couple of meals and had everything we needed.
The location is a bit from the city center, but buses and cabs were readily available. There is a Tesco and Sainsbury around the corner.
Slawomir was very responsive to emails. There is a key system to gain access to the apartment. We didn't need it as Slawomir met us and gave us pointers about the apartment and sight seeing advice.
I would definitely stay there again.