Overall, very nice apartment. It was nice to have a second bedroom, a washer and dryer to be able to stay fresh (there was even detergent) and the apartment came with a binder that included all instruction manuals for air conditioning, washing machine, etc. - all the important info that we needed regarding appliances. The kitchen was fully stocked with pots and pans and everything needed to cook and enjoy a meal. Everything was very clean, and there were even cleaning supplies available in case we wanted to tidy up during our stay. The bed was very comfortable and air conditioning was super helpful since it was a hot week. Also, Irena prepared a baby cot so that our infant would be comfortable as well.
There were a few negatives. Upon arrival, we were asked to sign a contract for our stay that was only available in Italian and was not optional. Knowing that we are not Italian, it would have been appropriate to present the contract in a universal language. We communicated with Irena and her sister via whatsapp; sometimes they were very responsive and other times it took several hours to hear back and some questions were not always answered. When we arrived, there was only a partial roll of toilet paper in the bathroom but when we asked about it, Irena provided extra. It is important for guests to realize that you must bring your own shampoo, conditioner, etc and that you will need to go to a supermarket (close by) to purchase basics such as milk and coffee. We did find salt, pepper, and some olive oil already in the apartment.
Great location. Close enough walk to St. Mark's square and also very close to a vaparetto stop. Quiet neighborhood that allowed us to explore another side of Venice.
Overall it was a great apartment and we would recommend it to someone who wants to stay in Castello. Although there were a few annoyances it was a clean and comfortable apartment and a good base to visit Venice.