I agree with Diana. I used to work in the paper converting business and fabric softener is just plain nasty. It is animal fat, usually beef tallow. It kind of goes without saying that the incredibly intense scents associated with most fabric softeners are intended to overpower what it really smells like (again, nasty). This is the reason why a person can purchase "vegan fabric softener". I am not vegan, but I don't use fabric softener. It coats fabrics with oils/fats, it increases pilling (especially in soft cottons), and it can stain some fabrics.
I've heard vinegar acts as a natural fabric softener. Although the comments section on the Milsoft site says the product smells strongly of vinegar, so I'd be interested in what their formula is.