To Everyone Playing the Asian Versions of Games
If you are like me and take advantage of the lower prices found on the Asian versions of PS3 games, then these cards are a MUST-BUY! Some of the DL content from games is region specific (for example, Fallout 3) meaning that if you have an Asian version, you'll need credit in an Asian PSN account to purchase it. These PSN cards from Hong Kong are the easiest way to do it. They are a little more expensive than face value, but add free shipping and the $5 off from a coupon, and it turns out to be a pretty good deal.

Spend wisely on spending
You just can't go wrong here. It's easy to use, it doesn't matter where you are, and you're now free to buy anything you like from the Japanese PSN. From games to add-ons to apartments & clothes in Home, it will all be open to you. If you use the Japanese PSN or Home, this card is a MUST!

The 5000 Yen PSN card is a must buy for the import gamers who frequent the Japanese PSN store.
These cards make it unbelievably easy to make purchases off of the Japanese PSN Network. The 5000 yen card was a very sweet deal, allowing me to purchase several Japanese PS3 and PSP games without hassle or frustration. This is essential for PS3 and PSP owners who love playing classic Japanese PS One games and digital only games like Rockman 9 and Marvel Vs Capcom 2.

Useful
I love it, very useful especially when you're not in Japan but want to buy contents on Jap PSN~!

200 HKD PSN Card
Worked without a hitch on my US PS3. Great for grabbing some Japanese PS1/PSN/PSP games.