Balazs's apartment was okay. It's convenient for public transport, and a short walk to a large Coop supermarket. The apartment is close to a main road, which can get noisy in the evenings and at weekends. I have noise cancelling headphones, and I slept with earplugs; these helped block out the noise from the cars and motorbikes.
Due to the lack of ventilation in the bathroom, mould can develop on the tile seals. To avoid disputes, I recommend that guests keep a record of the extent of the mould in the bathroom, and send regular reports to Balazs. I also recommend taking photos of the mould for use as evidence if there is a dispute.