mmmmm McDonalds. Yes its fat, yes it taste good. I only think McDonalds is bad for you when you eat it like 2x a week. You just overloading on fats there. I only eat it like once every 2 weeks to about once a month. Although there are some ocassional cases where I get it like 3x in one week.
In the end..It is both. But depending on how many times you have it will choose wether it is fattening or good. If you have it alot, its fattening. If you have it ocassionally, it is yum.