I've used Pandora (formerly Netscrape) for research purposes with great success. I've never experienced the hanging problems or crashes I read of in earlier reviews. I think it's key to play around with search terms, since that will impact on results very specifically. When I've scraped individual URLs, the program was quite thorough. Sometimes it does appear to halt arbitrarily, when one might expect that more material would be forthcoming from the Netverse, but what does get downloaded is almost always sufficient for my purposes, at least. It's a lovely program.