Spend the money on a new flashcart.

 

For me its not worth buying, even at its budget price (think its like $18 over there) but it is good to have on a flashcart.

Save the money and get a better flashcart, try it then and if you MUST have it I'm sure it would have come down in price a lot by then. I know that a flashcart costs more but still you can play other games the R4 can't.

 

Huh..? me and my 3 DS-buddies in school plays this quite often, and one of them has R4..
Why not update to the latest firmware..?

 

I have R4 and it works fine

 

Listen to this good sir.
Actually, I would probably spend the money on this game if I didn't already have a CycloDS. It's a great game

 

Like someone else said, if you want to save money, get a DSTT; they're cheap and can do everything you're likely to need. Here's one for 12 dollars, including shipping. (You might find a better deal elsewhere, though. That was just the first decent-looking one that came up.) You can read the GBAtemp review, or GBAtemp's FAQ. (Note that Contra 4 was fixed since that review, and works now.) It costs you basically the same amount as the one game you're asking about, so...

As for the game itself? If you liked N+, you should definitely get it. It's very similar (many small, challenging missions/levels.) But I don't know if it's worth a buy... anyway, you should get a new flashcard anyway. Even if the R4 is good enough for you (and I admit I liked mine, way back when), it's nice to have newer features like auto-DLDI patching and so forth. Plus, it'll give you an option in the future if you can't run games on your R4.