Other side complains about unintelligible sound quality

I had specially bought this model because it was mentioned here that Philips has 4 microphones and so works better. Unfortunately, I realized: Compared to professional conference spiders unfortunately qualitatively completely falling. As other reviewers write here. As speakers reasonably OK - as micro unfortunately so that the people on the opposite side always have the poor sound have complained. If you are practically over it keeps the face, it's "times" - but that's not the whole point of a conference speaker. Means: In the meantime I use my iPhone again without and score (unfortunately) better results. I find extremely bad - I had expected more, even after the partial positive reviews here. And yet: use and maintenance are straightforward and very OK - nutz but unfortunately nothing.