it's a goto tool for tracking, ranking, site auditing, and much more. You may have to pay a small fee each month for tracking stats if you exceed the free level, but you can give out a small program to your client to allow them to access the stats in real time which is a really cool benefit. You can also automate your reports and send them to clients (ranking, etc.) Very useful and gives your service a real professional edge. All custom branded with the Pro level license.
ebCEO also has Chinese search engines... I could go on, and on... It is really a great tool.
Hope that helps.