I had a Zync for a little over a month, logged on one day, and saw a pre-approval for everything up to platinum.
So I apped for Premier Rewards Gold and was approved (since you can't priduct change under a year).
I'm Happy 
if you pay in full, you will pry be rewarded too!
-MV
I think the Zync is a great fee card for anyone who (1) wants to get in the American Express family and get that back-dating thing going and (2) doesn't want to pay a ridiculous amount for a Green, Gold, or Plat.
You can tailor your usage and therefore your pack fees to areas where you'll actually use it, thus maximizing your rewards. IMO, that's a very smart use of credit.
I have yet to encounter any check-out clerk or waiter/ waitress (waitperson, I guess) who has either swooned or sneered at any of my plastic, and that includes back when I had a Gold.
I don't get the rush for everyone to so-call "upgrade" their Zync cards to a different one. Unless suddenly your life has become like that of the George Clooney character in Up in the Air. Let the thing do its job for you while you keep improving your credit profile, and then make an informed decision.
Even if you get a Gold card that's free the first year, I can promise you that you'll think long and hard before coughing up the money for year two. That's why I used to have a Gold, and now I have a Blue. 
