An ok road with some nice corners, and a couple of good roundabouts. Roads are wide with some speed restrictions, and a number of villages to pass through. Ultimately better than the A55 though.
This route has it all. Mostly national speed limit, constant twisties, as you ride toward mount Snowden in the distance. The best way to cross Angelsey. Then ride it back the other way to Holyhead for twice the fun.