I was greatly impressed with how quickly one could enter class information using only the keyboard. Other *MUCH* more expensive programs (ehem... Rose) make it extremely difficult to do this. Unfortunately, the interface (as others have noted) was very much out of sync with MacOS X HI guidelines, and this is considerably distracting. I also found that the reverse engineering for Objective-C didn't work at all. This could be quite a good product if the author spends some time bringing the UI up to date.