Thanks for elaborate about star rating system, we give four :-D. I'm Czech, my wife is Vietnamese. We travel, so we know similar style abroad. The problem was, we did not get instructions how to get to the room. Host phone was off (Friday 6pm, room should be ready sicne 3pm). We running to all doors in this location for one hour, even security came to us!! Not everyone has 4G data on phone, that's why I call phone number. I had to find free wifi in order to get some communication with the host. This time I start to think to get a hotel instead. We lost precious Friday evening time, I was really upset and I needed to pee. Also we did not get any code sent. I found AirBnb doors by mistake. I knock heavily on the doors. There were people inside, but they did not open. My job is software development, I read all instructions every time. But I don't have smart phone and I don't like to use this stuff when not at work. The host response for this situation was not something I could say I would like. Yes, mistake like not sending door code, not having your name on ring bell or mailbox, having phone offline, not sending instructions if you require specific process, can happen. Even this was bad coincidence of several things together. But you cannot expect or demand five stars then. If I make mistake at my job, I also don't get good rating.