S&S gave thorough instructions and information about our stay before check in. However, they said there would be an info card on or near the door, and when neither Dani nor myself could find it, he said I should message the host to ask about it. I did so and never got a response. The WiFi information was apparently on the sheet, but I ended up just finding the info I needed on the router/modem.
Dani was the person who ended up checking me into the apartment, which was overall very clean and comfortable. It looks just like the pictures. The location was great and S&S gave a great recommendation for brunch that my brother and I enjoyed.
Overall, we really liked the apartment and would stay there again.