Sando is an indexed search tool, which means two things: it's fast and it's accurate. Indexed search is more accurate than the ordinary code search functionality built into the IDE, which outright fails most of the time anyway (Ko et al.)! Sando also comes with auto-suggestions to help you quickly find what you need. It's basically Google for your project.
Bottom line: if your project is bigger than one to two hundred lines of code (it is), you should be using Sando.
Ko, A.J.; Myers, B.A.; Coblenz, M.J.; Aung, H.H., "An Exploratory Study of How Developers Seek, Relate, and Collect Relevant Information during Software Maintenance Tasks," http://dx.doi.org/10.1109/TSE.2006.116