I stayed at Christie's place for three nights during my work trip to Boston. She had only seven reviews, so I suspect she's a pretty new AirBnB host. However, I was willing to take the risk because the reviews were very good (5 stars).
Unfortunately, my experience didn't match the good reviews. First, the apartment was dirty: the counters of my room were dusty with sticky marks, the carpet required vacuuming, the bathroom was dirty and full of hair. Also, based on my previous AirBnB experience, after the arrival hosts usually inform guests about the basics such as where the room and the bathroom are, hands out the key, and tells if the guest is allowed to use the kitchen and the possible WiFi info. Instead, I had to separately ask for this information from the host, and she felt very reluctant to give it to me (she was texting).
The second evening Christie had her boyfriend (?) visiting her, and I ended up accidentally walking to the bathroom when he has there (he didn't lock the door, and I didn't know the bathroom was occupied). Last, I suspect there is at least an occasional pet (dog/cat) in the apartment since there was animal hair in my room and the bathroom, and bowls for water and food on the floor. Luckily I'm not allergic.
On the positive side, Christie was very flexible with the check-in time (due to work, I arrived at 11pm), the apartment was easy to find, and well located for my purposes. The bed was very comfortable too.
However, I will be using some other place next time.