Legendary? Maybe in the past, but I’ve not seen anything special in the past few years. I’ve received counterfeits they won’t replace, only refund. USPS shipping ruins the 2 day guarantee, and ever fewer products seem to be guaranteed vs expected.
The worst was ordering a Netflix gift card for my mother, email never arrived with the code, and support said they couldn’t do anything. No resend worked, they refused to refund because the system said “sent”, and couldn’t give the code directly because they have no access. Netflix support tried surprisingly hard to help track down the card from their own system, but Amazon had blocks of codes and they couldn’t identify.
Escalated the issue twice to no avail, tried emailing the Bezos account and never heard a peep. My only option left is a chargeback, but then they are likely to just close my account permanently as a final f-you.
Results of course may vary, but their service is garbage imo.