--- Display search fields as text field, drop-down select, multi-select, slider, slider with range value select, radio, tag (ability for multiple tags select), category, item title (text and A-Z), item text, item creation/publish dates;
--- Restrict search to specific category (static by category ID(s) and auto by the category you are viewing);
--- Order search fields;
--- Display search fields in several columns;
--- Order search results by extrafields;
--- Display search results in standard category view;
--- AJAX search results.
But i am saying again this is a very good module as it is!
In short, htere is few things:
1. very confusing modul interface
2. no documentation, detailed demos, examples of work
3. problem with hidden menu item. If you choose to force itemid for search results and itemID is hidden menu item, when url is active, somehow broke menu functionality (tested on RT templates).
For joomla! 2.5 works great.