I like that it's easy to use, even if you're new at this! It is very simple for someone who has never used bitly before as well; just copy paste your link into their search bar or click "create" button which will give them an option of creating one themselves (if they don't have any).
The only thing i dislike about bittyy was when my account got hacked once so all those clicks were going through me instead of whoever clicked from where ever - but now everything works fine again :) Great tool overall!! You can create shortened URLs using BitLy without having accounts elsewhere such Facebook etc., This makes sharing things easier than other services out there because no need to log-in every time we want something shared.