Buying the card works the same as with all other products on Amazon.com, the download, however you get the code after a successful purchase delivered in its software library. There, the code remains virtually encrypted until you explicitly clicks on it and it will be displayed. Even then the code but does not disappear, but may be recalled at any time but only works one time in the Playstation Store. There he is entered and activated for Playstation Plus 3 Monte or 1 year.
Playstation Plus is sort of the digital customer loyalty program from Sony. I refer in the brief description only to a PS4 system.
1. PS Plus you get access to a monthly changing games library. There are two downloads for PS4 available. The games can keep as long and be played as you continue Plus owners. At the end of the subscription goes out of access to the downloads.
2. Exclusive discounts of 10%, 20% or more on selected digital products per week. These discounted purchases can be retained even after the end of the membership.
3. Full Game Trial and demos that only PS Plus members get (yet very small selection).
4. Online Multiplayer is only possible with PS Plus on the PS4. Without you unfortunately can only play offline.
You need now PS Plus?
In my view, yes. It is the perfect complement to the Playstation and the monthly access of free games is great (even now the beginning of the PS4 already existed some right good games that musten to buy expensive on the Xbox One).
Conclusion
Download works great, the code is displayed directly, there was no waiting time and it can be immediately entered on the PS4. Recommended!