Ranked in these QuestionsQuestion Ranking
Pro 19 characters long
Including the "https://" at the start of links, short links are typically 19 characters long (so 11 characters plus the https://).
Pro Links last forever
The links created by is.gd will never be deleted down the road, meaning you can continue to use them years down the road without worry.
Con No central location to see all your links
If you want to see data for your short links, you will have to visit each link individually and adding a dash (-) at the end of the link, or enabling automatic previews.