These are massively underrated bits of kit...
I actually have two of these myself, one downstairs for occasional bass playing but mostly for music listening, and one in my little upstairs studio/office that I use for hours daily for music and for webex meetings etc. (currently using as we speak).
The sound quality of these for audio playback is exceptional, if you buy it purely as a Bluetooth audio device for Spotify etc you'll not have wasted your money. But as the seller says, it can be used as an Audio Interface, a wireless practice amp and you can have three instruments and a backing track running at the same time. £150 is a steal. Absolutely love mine. Rant over.