Itīs worth to try and if you happen to not like the results, itīs temporary.
Cassia has pale yellow/golden dye. I have been using it mainly for strength and shine(I add amla, too). I donīt wait for the dye release and apply it for an hour only, but somehow I still end up with golden roots. My natural colour is ashy and cassia helps to "warm it up" a bit.
Iīm sorry I donīt have a "before" picture, but after cassia it looks like this:
You can also see my current root length here.