"I ordered a sensor in May, 2017 the product finally arrived in June, 2018. The delayed delivery prevented me from examining or installing the product until August. Finding the documentation inadequate and the product sub-standard I contacted GPS4us for assistance contacting the non-responsive manufacturer or return of the product. My request was met with intransigence, refusal, and frankly rude responses. Claims of inability to assess the condition of a returned product flies in the face of their About Us webpage touting their expertise."