they are a wonderful company with an excellent tech support group. they stood by every product they sold. i wore their sensors for a year and a half. i couldn’t get them to work properly on my body, perhaps b/c i am simply too lean and didn’t have enough tissue for proper insertion; so they would come off, or hit a nerve, a capillary, or muscle going in. i could never get more than 3 consecutive days out of one; i KNEW, seemingly, every staff member they had in their company. they MUST have had a file on me as thick as can be. but NEVER once did they deny me a replacement sensor. NEVER ONCE. and, they would over-night it next day air with their apologies.i would recommend DEXCOM to anyone.