I really like Redactor and am considering switching to it from wysihtml5, but the one thing that has been holding me back is the design of the modals for things like editing links. I really wish they were more easily customizable because they look nothing like the design of my site. For example, I put the cancel button on the left and the ok button on the right and I use bootstrap to style it all. Redactor uses a link for cancel and switches the button order. I know this is a small complaint, but keeping consistent design is good design.