I just got the MB Platinum. I'll pay $25 extra dollars for 25,000 extra Membership Rewards points
. I haven't received anything from MB yet, but from what I understand, there's a $1,000 accessory voucher, and some mileage waiver for leases. It's pennies when you're dealing with a Benz, but still nice.
Oh, and I'll confirm, you can use the $200 Airline Fee Credit for Gift Cards (for tickets) on US Airways
Booked a third-night-free stay over labor day weekend through Fine Hotels & Resorts too. With that & the airline reimbursement alone, the card has already paid for itself...