Ordered and received KOSS SB-45 Communication Stereophones two weeks ago. Shipping and delivery from Amazon was great.Regarding the headphones and microphone, the sound quality is good on the receiving end. Unfortunately sound quality from the microphone is slightly garbled - based on recorded voice tests. Most disappointing however is the fact I cannot hear myself talk over the microphone (there was no voice-feedback). If you have ever talked to someone wearing safety earmuffs, you get a feeling of how distracting this can be. You don't know if you are speaking loud enough or too softly. I work a lot through internet collaboration websites, and I found that it was simply better to use my smart-phone rather than these headphones.Having thrown away the packaging, I am doubtful I can return this set to Amazon for a refund. Be assured, unless this is a malfunction in the Koss headset, I will not purchase another product from this brand.