Instruct: Classify Amazon reviews into positive or negative sentiment
Query: product did not work / Inadequate customer service

Without going into great detail, I cannot recommend this product. It did not expand the range of my wireless router, and after SIX hours, yes that's correct six hours with customer service, and speaking with four different "specialist" on three different occasions it worked, but it didn't expand the range. During this time they managed to completely disable my cable modem at one point and I didn't have any internet service at all. The "expert" told me to call the cable company because the cable modem somehow mysteriously sopped working after three years while he had me rebooting every device attached to my computer. Save yourself the trouble and avoid this product. I sent it back and have had a great sense of relief ever since