I picked it up again. Apparently thingstud.io doesn't work with staging. In general it's very frustrating and so far I couldn't find one that worked with staging and that is reasonable easy to install on windows. Grafana seems like it will probably work but the windows installation instructions weren't really encouraging.
So far freeboard seemed the easiest option but that requires secure web sockets. And as far as I could see that's not supported by the ttn MQTT broker yet.
I also got the feeling that once it's set up it's quite easy and a straight forward dashboard showing temperature readings could be set up in 15 mins or less. Is that correct? And if this is the case, could someone fix this for me? Usually I'll try to figure it out myself but in this case I need something very basic for demonstration purposes asap. Showing a list of hex data readings is just not that convincing I'm afraid