<prompt> Translate the following text to EnglishWengine wanasema kwamba ubora wa huduma, vipengele vya bidhaa, na gharama ya msingi ya matoleo haya ya Huduma ya Posta hufanya isiwe ya ushindani.  <response>: Others argue that the quality of service, product features, and underlying cost of these Postal Services offerings make them uncompetitive. 