Well personally i had successfully installed with otpless in 5 consoles, but a friend of a friend, yesterday aak fo my helicopter because he brick his new xl the galaxy new edition)
Edit: just read the helicopter thing it was autocorrect, way to funny to edit now!!, he asked for my help**
After prwsing select on a9lh installer v 2.5 with al the right files (i have checked them afterwards), the console just went blackscreen, with power led on, after doesnt boot with or without sd, recovery doesnt work, nothing does.
As i stated, i checked the hash of the files he used, and according to him, he also used the stock sd card which i dont think it may be faulty.
He refused to post about it for some reason, (he's kinda weird) but whatevs...
If this is a bug in otpless install i'll stick with old 2.1 crt transfer for the new 3ds, until we know more about it.