Shorl 3

If you've ever sent or received a long URL into an email message, you may have noticed that it wrapped into two lines or more. This often breaks common behavior, such as clickable links (only part of the URL becomes an 'active' link), and also makes it impossible to copy-and-paste the URL to a web browser in one move.
In terms of functionality, the service is good and reliable, you get free short URL and ability to track statistics through it with no need to register. So, it can be a way to investicate effectiveness of different marketing channels. The drawback is in inability to choose your own subdomain records.