I have used cameras for a long time, none of them weather sealed, without any damage from water or dust.In fact I don't recall it even being an issue.But now I am deciding between an xt2 and xt20 ,mainly on this basis and the $700 price difference.I will never be out in the rain with this gear, but it will be exposed to ordinary dust, and perhaps high tropical humidity.I am leaning towards the xt20.This has perhaps been covered before, but I can't find a search function.