Good for a DS.
Story: Whatever you find.
Gameplay: This is an internet browser, which means you can surf the internet with it. Visiting sites can be done by means of searching for them or entering them directly. Than you can do whatever you're allowed to do.
Pros: You can surf the internet (C'mon, it's obvious).
You can visit it on your DS.
Keyboard is easy to use and accurate, and has all the features of a normal keyboard and then some.
Cons: Slow load times, not too slow, but not for people who can't wait more then twenty seconds (The maximum for a page to load).
Some pages will not load unless you have enough memory to display them.
No online gaming (They don't want you playing illegally hacked games for the DS on your DS).
No video.
Overall: This is more of a personal preference thing. If you're just playing it for fun, then get it, go ahead. It is free for purchase from the DSi shop after all. If you want it for serious internet play, look elsewhere. This was designed purely for the fun of internet surfing on a DS.