A few notes on changes that I think should be made to this plugin:
- Allowing HTML in the "Content Format" box would make the plugin much more flexible in terms of presentation. For instance, I could wrap my title and summary inside of a div, then wrap the image inside of another div
- Forcing the user to specify a width and height on the post thumbnail is not a good idea. This should be done with CSS. Furthermore, it prevents plugin users from creating fluid images for a responsive design.
- Allowing users to change/specify classes to be used on all of the "formatting tags" would be a great benefit. It will make it easier for designers working with large stylesheets.
That said, it's a good plugin. These few changes would make it a great (5-star) plugin.