Compare adequately- do your homework
The customer service is good, but could be better if there existed a consumer-friendly website, so you could submit questions or comments without having to be on hold for a long period.  Also, the unit itself comes on a string that goes over your head..very uncomfortable, but replacing it is a problem because the opening is only large enough to accommodate that ‘string.’ The others I’ve seen have a sturdy cord with magnetic closure which is much more convenient AND comfortable.
Rating: 3 stars