Celina was very friendly! We also had a very friendly exchange student during my stay, which worked out well. Celina slept on the couch and gave her bedroom to the exchange student, which was very nice. I still had my own room. The dog is also very sweet and calm. A few mornings the dog visited my room in the early morning when the rumba vacuum machine went off, but that was no problem. Celina is around the house a lot and can give you a lot of tips about everything. There is also a TV that is usually on in the living room when Celina is home, and the TV has Netflix and is available for you to use too. The place is clean, which is very nice. The rumba goes off every morning to vacuum. The kitchen is also clean, thanks to strict rules of immediately washing your dishes, drying, and putting them away. Also, the place is generally quiet except for some loud rock and roll music from the upstairs neighbor in the mornings and thanks to a no guest policy, the apt will likely just be you, Celina, and possibly the super friendly exchange student.