If you are any level deaf/hard of hearing, what Bluetooth headset do you use and

what are the pros and cons? Please list what type of hearing loss you have, unilateral or bilateral, and conductive, sensorineural or mixed and whether you use a hearing aid or not and whether that is in-ear, behind-the-ear or bone conduction. This is for product design research for a Bluetooth device for the deaf and hard of hearing, thanks!