What are the benefits & limitations of GIF89a animations?

What are the benefits & limitations of GIF89a animations?

- Transparency, Compression , Interlacing, various colors palettes are applied

- No plug-ins or supported software required.

- No web server or server side includes or PERL scripting is needed.

- Provides reusable and repeatable animations.

- No need to download the animation constantly by modem, as the whole animation is loaded only once.

- The size of animated images is compact.