Like what can you do with it exactly and is it worth getting?
You can run Decrypt9 from A9LH and restore NAND backups but there's a chance that if your system is messed up enough even Decrypt9 won't work. Not sure what it would take to prevent Decrypt9 from working though.In addition to the above, hopefully soon it would be possible to have android-like recovery on your 3ds. If you screw up your system, you can restore a backup, no hardmod required. But this isn't happening like tomorrow.