No customer support, no phone number, they ignore web requests for help for refunds or problems.
I have no idea how this managed to get so many high reviews.  I had three online orders that I used with the card that the restaurant said they never received them, and when I submitted a refund request through the subway website (THEY HAVE NO DIRECT WAY TO CONTACT THEM, NO PHONE NUMBER.  The number on the back of the card simply tells you to visit the website) they didn't respond.  Also, last year one of my cards got locked and I was never able to get them to respond to unlock it.  Just know if you have any problems, you are completely on your own.  Out of about a dozen subways in my area, only two will accept a physical gift card, and since the online orders don't always reach the restaurant (although I am skeptical of that too), you have absolutely re recourse. None of the subway restaurants in my area accept any of the coupons either, online or in person.  Subway is going down hill.  After I burn off what can with the cards I have, I'm taking my business elsewhere.
Rating: 1 stars