Thumbnails in search results

For the search engine " Runes Runet " added showing thumbnails of the main pages of sites, which are links from the search results page. To see the preview you need to move the mouse cursor to the appropriate link. This feature is implemented using the Websnapr.com service.

Another distinctive feature of this search engine is the display of abstracts of the documents found - the three most important sentences of this document (regardless of the query words).

I would like to hear comments how convenient is the display of search results in this form.