I printed out the voucher and redeemed it for the a Frankfurt Card the tourist information centre in the Central Station (Hauptbahnhof), very close to the main entrance, as soon as I arrived at the Central Station by train. This way I could use the card immediately for the city transportation, which is all free if you have this card. You basically get your money back after 3 Bahn/bus rides, not to mention discounts to most of the city's tourist attractions. I'd recommend this card if you want to explore the city by public transportation and/or visit more than 2 museums. When I purchased this card online there's a glitch in the transaction, which cost me more money than I should have paid. Because that happened less than 24 hours before the card became valid, it was too late to cancel the transaction. I emailed the customer service. The problem was solved after 2-3 days and I got a refund.

Saw the Frankfurt Card on-line and purchased it. Loved the flexibility of hopping on/off the metro as often as I wanted while in town. Only two drawbacks: 1) I could have purchased it at the airport, but since I had a voucher, I had to exchange the voucher in town (required me to pay additional metro fare), 2) Would be nice to have the card valid for 24 hrs instead of only for a particular date .

It's useful to get transport card however there are very few places you can convert your voucher/coupon to an actual ticket. I was surprised that there is NOT tourism information desk at the Airport. Next time i may get a ticket localy as it will save me time looking around.

If you want to explore Frankfurt and enjoy the discounts in almost everything, Frankfurt card is the best thing. It allows you to move around wherever you want using public transports. Frankfurt Card really made our trip very easy and beautiful

Easy to get because the tourist information office it was in the central main rail station.Very helpful with the public transportations and you have 20 percent discount to all activities such as visiting museums .I recommend.