I like that it's free, but there are many more options than just domains to shorten urls with this service! It has so much functionality you can customize your page for how its going be used by others when they click through from different websites/etc., even if those sites redirect people somewhere else after clicking one of their links or buttons in pages within other webpages which is neat because my website doesn't have any ads at all since i haven;t promoted anything yet.. And also having analytics available makes things easier as well where data about traffic patterns etc. comes back into handy sometimes too!! Not really sure what everyone could use these services out though?