Irina are you associated with broadlook in anyway? please advise - not trying to be rude, but have noticed that your name comes up with broadlook pretty frequently, and would appreciate knowing if you are affiliated, or if your recommendations are based upon personal use and not because of affiliation or association
As a researcher and sourcer, I have tried a lot of tools as many of you have and it is unfortunate that there is no silver bullet out there, but eGrabber does a very good job of simplifying the boolean process and takes the hard work out of developing search strings. It can net strong results when used properly. I also use the Broadlook tools and find they still require a lot of messaging. Talent Hook is a good tool combined with an ATS. At the end of the day, there are many tools available and you need to learn how best to use what tools for whatever purpose so building a tool kit is a necessity.