I thought I didn't have any problems, even having asthma. Ipe didn't do anything to me, I am in fact used to it, and don't mind it at all. Until I started bandsawing up ERC, I hate working that stuff now. It kills my asthma. The faint smell lingers for like a month all over my house it seems, or something. And I know it smells really good for the most part, but for some reason it just gets to me and seems to make me sick too.