Ed from GADGET MADNESS!!! takes a look at the Metal Gear Solid 4 official headset. Ed says that while the headset does look exactly like its promotional pics, he points out that headset's sound quality is quite poor — like having a sock in your mouth! The review also provides a quick rundown of the peripheral as well as a audio comparison.
MGS4 Bluetooth Headset Gets Reviewed [PS3 Fanboy]