I don't know if this is real or not, but as everyone seems to think bricks can't happen with this launcher, I want to remind everyone that it's patching the system to redirect NAND access to the SD card. If something goes wrong with that patching or it has a bug, it could happen that it tries to write emuNAND data onto the real NAND and that could cause a brick.
Example: smea's first test of redNAND when he bricked his 3DS and had to get a new one.
That said, I can't think of any other ways it could cause a brick, and as this is the first (and yet unconfirmed) brick I would say the risk is relatively low. But it's important to consider the risk before trying it out. With a NAND backup such things can be recovered from, but not without some effort. I have a NAND backup, and have been wanting a hardware NAND mod anyway, so I'm not overly worried.