I'm using audio pro speakers since a few years (before wiim appeared) and have also tried speakers from most of the available alternatives (Google, sonos, Alexa, jbl, Marshall, blusound, denon and a few others). I went with them initially because they sounded better to me than all other alternatives I tried while costing less and also looking better in my opinion. Some months ago I wanted a new speaker for my office and compared the jbl authentics 500 to the audio pro c20. I liked the sound and features of the c20 much better personally. So yes, audio pro produces great speakers.
I just really hope wiim does not break functionality with audio pro with coming features, as this would make a lot of my speakers kind of obsolete. It would be great to get some kind "official" confirmation from the wiim team that wiim devices will keep working with audio pro speakers, even with those coming features like persistent groups.