Anyone got this working?

Spent a quite frustrating afternoon trying to get Soundsystem to work to no avail.
It looks like exactly the kind of plugin I want i.e. make a playlist drawing from Spotify as well as other sources like Soundcloud, but it seems like a lot of effort and no result.
Maybe what the plugin does is just too technical for a simple interface, but it feels like solving a puzzle to get anywhere with it. Eventually after wondering if maybe radios and albums might be important, making individual track posts, and putting these codes into a playlist post, I get what looks like a player strip at the bottom and a post with ‘!’ icons beside the tracks.
There’s no feedback so I have no idea where it’s gone wrong. I get the feeling it should be much simpler than this (maybe I’m missing something?)
All I want is something that looks a bit like Spotify, but avoiding Spotify if possible, and if Soundsystem does the clever work drawing in the music then this should be the easy bit.
Anyway, it looks like it has great potential, so I felt I had to say this, I’m sure it could be very useful if there was an easier way to use it!

The page I need help with: [log in to see the link]