You can tell at a glance how the animation is going and which frames are causing problems. The main criticism I have about the program is the lack of an undo command. It's a good, solid GIF animator with an easy interface and several powerful features, although it lacks some of the functions of other packages. Right to Left Software's Animagic GIF Animator isn't quite in the same league as the other three packages. It can only import four file types and can't handle Photoshop documents at all.
Frames display one at a time in the upper left corner.
You can't view all frames at the same time, although a frame list does help you navigate quickly within the animation. Animagic does some transitions, although they are less impressive than those in the other packages and do not include a transition preview. You can reduce the color depth and optimize. But Animagic gives you only yes or no choices for optimization and does not tell how much space, if any, is saved. Overall, the program does the job, just not as elegantly or easily as the others.