I'm probably not a typical case, but I felt like my privacy was massively invaded. The concept was cool, but I felt like every muscle twitch was being scrutinized and recorded forever. I was also in constant fear that the computer would charge me for things I didn't buy and getting it corrected would be a nightmare. I also felt like if there was a bug or malfunction in the system and it didn't charge me for something (which I wouldn't know about immediately) they would come after me as a shoplifter with the full force of a mega corporation with unlimited resources. It felt like there were a thousand high powered lawyers that I couldn't see, watching my every move waiting for some mess up (even though I have no intention whatsoever other than finding and paying for the product I wanted).

So no I didn't feel like I was a thief. But I felt like they assumed I was a thief. My guess is most stores are heavily surveilled nowadays, so it might be unreasonable for me to feel this way with Amazon but not Walmart or Target or Kroger, but that's how it felt.