It's great and we'll used in my library (outside Helsinki). Generally my perception is that it's a mix of kids printing silly things and adults printing spare parts and useful things. I've seen people print parts for their drones and some other odd spares. In my library they have 5 Ultimaker 2's and they are all in use most of the time. Worth nothing is that using them is free, and unsupervised, you just book them online and go there and plug your SD card or "lend" a card from the library to use with a dedicated 3d print computer.

You are required (or encouraged not sure) to do a quick intro course though where they show how to change color and start the print.