The product works as advertised. Is is especially valuable if you have a mature and complicated org. It's a great tool to see where metadata is referenced and will help you make changes with confidence that you won't unintentionally break stuff.
Something I was not expecting (or even thinking about it) when downloading the tool, was the customer service. I had an issue and Satrang's rep (Chirag) worked hard with me to get us satisfied and squared away. It's a 5 star product and 5 star support