I spent months looking for and testing search engines which could replace the standard DNN search - especially one which could read articles and pdf files. After many failures I stumbled upon Search Boost and am delighted I did so. We got results we were expecting on searches, were able to tweak the engine to search multiple portals and are very happy with the product and the technical support. We had a few gremlins on installation - probably at our end I suspect as we were also in the middle of migrating site to new server - however Bogdan sent us license files and clear instructions on how to get up and running within the hour - brilliant service.