I was on standby in this superior room for quite a while, and the unfortunate thing was that it took 3 days for the smell of the drain in the bathroom to disappear. So, for 3 days, the smell was really bad in the bathroom and even spread to other rooms even though the bathroom door was closed. In addition, the Wi-Fi access was unstable, the connection was on-off-on-off in my room (no. 2). I thought at first maybe the Wi-Fi settings were set to have a timer every few minutes (?), but it turned out that after I moved to another room (no. 9) the Wi-Fi was very smooth. Otherwise, apart from the smell of the drain and Wi-Fi access, it was safe.