1. RSS feeds for the Classified Ads
2. Ability to restrict a field to a given category or some given categories in large sites does not work properly as the categories unselect after saving.
3. A little bit of work on the overall look of the component.
This is a very good component and I by far admire the work done to put it together. I would advise every one to use it as long as they want Classified Ads functionality on their Joomla sites.