It will work on 10.5 and A9LH, but you may need to find your own firmware files for 10.5. It's completely safe to use on sysNAND and I honestly don't suggest using emuNANDS anymore.I wanted to use it. Will it work with A9LH on firmware 10.5? Should I use it with sysNAND or with an emuNAND?
Just be aware, any issues you run into will not be fixed.