Yes it's not tested much, as you can see there aren't too many people in this forum, I myself tested it, I know Lyrin tested DSiWare install, that's about it.I haven't tried TWLnf yet because of the warning that DSi NAND mounting hasn't been tested yet. Have the scripts for downgrading and installing DSiWare directly on the console been tested? Also, does the DSiWare installation script hace checks to make sure the launcher won't go over the maximum amount of blocks allowed for DSiWare?
Just to clarify, I don't mean to be picky, I just want to make sure the "too many blocks" edge case has been accounted for and that writing to the NAND on the console had been tested. If that's the case, I'll work on adding it to the guide.
Let's continue the "too many blocks" discussion in the other thread.