I was hoping to find a decent bluetooth speaker with extremely low latency over aux. However, while it has no noticeable latency over both instrument and aux inputs, it is very noisy. Even with all knobs turned down and nothing connected, you can hear the hissing from a meter away in a quiet room. If you planned on using this at home for quiet practicing or listening, and you have somewhat good hearing, there is a good chance you'll be annoyed I'd say.
Shame. If they charged 50 bucks more for better, less noisy electronics I'd be happy to spend that money.