It's an interesting way to do it, but I would personally prefer wifi-based:
* Allows usage from laptops
* No app to install
This could be integrated to several stock pi images from other projects, and I think that's where this really has potential. There's WiFiManager [1] for the esp8266, but this is the first time I came across something similar for the pi.
I don't recall my RasPis having Bluetooth built in. Maybe it's the newer models.
Just saying perhaps including the word "Bluetooth" once in the description would help. Looking at this page the first time it wasn't so obvious what was going on or what it does.
* Allows usage from laptops
* No app to install
This could be integrated to several stock pi images from other projects, and I think that's where this really has potential. There's WiFiManager [1] for the esp8266, but this is the first time I came across something similar for the pi.
[1] https://github.com/tzapu/WiFiManager