I used to use YOURLS but I think it is hard to install, not like a normal plugin and doesn't have half the features that even the free version of Pretty Link has! I've installed Pretty Link Pro after using the free version of Pretty Link and I think it is AWESOME!!!! The free version was dope but the pro version is full of features that are essential if you want to do some serious internet marketing. I'm using Pretty Link pro on three of my clients sites and it is super easy to use.