dapu motor

I bought a e trike recently and had to warranty the Dapu motor (started having bearing noise or something from the axle) after only 500 miles. I only have a 1 year warranty from the seller, and am dubious Dapu (who seems to be notoriously silent on responses to other users on this board) would...

I am planning to buy a Pedego City commuter which has a dapu mid motor. I don't know much about this brand. Can anyone advice if it is a good motor or not ? I feel shimano as a better option but it comes with higher price tag.