Easy to use, you can look up any domain that is registered by another person or business with out having to worry about registering your own who owns it! You also get all sorts of other useful data as well which makes this service worth using for those looking into doing so professionally such as myself but not sure how accurate their information could be? It's easy enough to figure our yourself from what I've seen in terms of accuracy if there are errors at times however i have yet t find anything wrong personally when working within my field of work where we need correct contact details. Checked domains names before purchasing them for sale etc., check ownership over time - helps avoid issues later down stream once purchased.