User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-4411728-20130321161347/@comment-204.77.219.25-20130321162643

I think it would depend on how big the SD card for your 3DS is. I read that it's 1.74GB to download, which is fairly big if you only have the standard 3DS with its original SD card (which is 2GB). If you have the 3DS XL or a bigger SD card, that's less of a problem so the download one would make sense.

But I, personally, bought the hard copy because I don't play a lot of games on the 3DS besides Pokemon so I don't see myself forgetting to bring MH. Also, I'm impatient and wanted to be able to play ASAP.