Definitely cool, but at 35GBP ($45 USD), it's definitely a bit overpriced imho... at $15-20 USD, it would be something you'd get a few just to play with. I'm not sure I even have a great use case for something like this without spending even more on a surrogate device to work with/against. For around $60-80 USD I can do an RPi3B+ with case etc and a btle adapter. It's not as small, but as I said, the puck is really limited without a surrogate device anyway.