The sound quality is great if I'm listening to media but it won't play my custom ringtones like my older, cheaper, Plantronics Discovery 610 could. I always have my ringer silenced so I rely on the ringtones to identify the calls I really need to take. I don't understand why this ability would go away?
The call sound quality is pretty bad and the built-in call volume controls are nearly useless. The 'Call' button is difficult to positively locate because it's only slightly recessed from the surface which, of course, makes answering a call in a timely manner frustrating.
I also wish it would announce email and text receipt alerts. It seems to me that if the phone is producing a sound, then an earpiece connected to it should, also.
I bought this because the mounting post for the earpiece and earloop broke on my 610. I'll have to hope that my repair of the 610 will last a while longer and return the Marque 2 M165.