I think Shure's customer service is great. But the points raised here are probably uniform for everyone who has bought the BT1. Mine is also very very load with the SE535 but reasonable with the SE215 (although the voice is completely sibilant with both). The other problems reported also happen here and there. As its a new product, if Shure already has two kinds of products, where one of them is already improved, then it would be interesting to know, and very appreciative if they can replace the problematic units. However, my intuition says that a new version is yet to come.