I like how easy it is for me as an individual, or even in small groups (we have several teams within our organization) to find those people who are very similar to us at different levels throughout my network with many degrees between each other! It's also great because you can see what connections these individuals share when they're not connected directly by email address alone! The only thing i dislike about power linxs system is there isn't much customization available so if your looking into finding someone outside of your current circle then this might be something worth considering.
We use powerlinxs mainly to connect employees from two separate locations together via LinkedIn.