Good... Not as good as the iPad.
I love this app, and it is such a lifesaver for high school. My only issues with it are as follows: This app is very basic, and when compared to the iPad or iPhone version, it is crap. There is no way of creating different types of assignments (homework, test, etc.) on the Mac app, whereas the iPad or iPhone version allow to create these, and weight them for how much they contribute to your course mark.
My other issue with the app is that it does not sync properly with my iTouch. Finally, it really is a good application all in all., however some improvements would be greatly appreciated!
OMM about
iHomework, v2.1