The bad:- Not too big of a fan of the microphone/button thing that hangs on the side because its a bit too big- Inaccurate battery percentage reporting (through Bluetooth to my iPhone). My recommendation to the manufacturer is either dont assemble these saving assembly, packing and shipping (smaller box) costs or use a jig to ensure alignment and better QC of the final product. Generally metallic noises are always heard on high notes (There is a firmware upgrade Feb/Mar 18 for this but it does not change this problem I have done it! Zit hier nog steeds met de verkeerde maat schoenen. Perfect little hook for our virtual classroom set up. The case is Very sturdy and the containers are also durable. I brought them in and was totally pleased! Unfortunately this product does not perform. Thanks for reading! Ive had this pair about three months now and they havent loosened at all.