I've used this service for about 3-4 trades totaling ~$1500 in gift cards.
All the codes have worked and no issues on amazon. Only issue is I have to send an email to check on my order each time. Codes are sent within 24 hrs.
Since Amazon does not accept Bitcoins directly, Gift cards from Bitcart and other such services give the user ability to buy from amazon specially for those who do not have credit card. I myself used Bitcart few weeks back and I am satisfied with their services.All the codes have worked and no issues on amazon. Only issue is I have to send an email to check on my order each time. Codes are sent within 24 hrs.
I ordered a 50$ gift card and never got it
https://blockchain.info/address/15WVdWTh6ptrGEsaVJ5RMrrsExfKHbzcWZ
BitCart, am I going to get my gc?

Did you finally get the gc ?
Yes, but I had to send a couple of e-mails in order to get it

I bought 350$ gift card, and its been 2 days already and he isnt replying via mail, he initially replied that his service is trustworthy and all that but havent recieved the code yet, wondering if you can any way help me, or if you can message him if you have some direct contact to him.
I've used his service few times and he really slow to reply email. All you can do is waiting (or send another email).
After a few emails back and forth, the support team did right by me and gave me a refund. Also, they pointed out that an email was sent with amazon codes a day after I purchased it and provided screenshot proof of sending it. I haven't received that email (maybe error on their mail servers or mine). All in all it was a good experience. I would recommend them to others.