It’s a bit worse off than clunky … my wife uses it the most. 1/2 the time for music and 1/2 for internet radio.
Took about 1/2 a year for her to figure out the UI enough not to call me to fix it every time she switched stations or to/from music.

Several problems
1) it’s not obvious which xformer/air you’re controlling … we have 2 units running (used to have 4 but took 2 off to simplify things)
2) sometimes a buffer doesn’t get cleared so when you switch stations the old one continues to play for a while (which results in a user feedback loop)
3) every once in a while I have to reset a unit (a pain since both are on a high shelf and requires a ladder)
4) the UI it self was obviously never user tested. There are actually ways, methods for doing this.

My wife has suggested that I help Axiom out (this is supposedly my area) but coming up to speed on all the open source stuff would be a killer time sink. Way too much time for a side project …