There are a couple of different use cases. The first one is that I bought it for my home because I needed a dedicated Wi-Fi access point, and I was intrigued with the way it sets up. I enjoyed the performance of it, and I recommended it to a friend of mine who was totally non-tech savvy. The thing that was super cool about it was that he was able to plug it in at home, give me a phone call, read me the serial number, and I was able to provision it remotely.
I also use it at work. It is something that's convenient for other engineers to hop on real quick and do unhindered testing.
I'm using AP12, and I'm using the 1900 switch series. It is 1930 or something like that.