The sound from the speaker is low even on the highest setting and the quality is not great when talking on the phone.
It's a watch, what were you expecting? The quality and the volume are sufficient for calls in a pinch or for a quick discussion, assuming there's not a lot of background noise. For music and/or using it regularly? Again, expectations
I had a galaxy watch 4 and the sound was really good. For the price (450/500 €) of the Venu 2 plus, I expected to have the best.