Parts of the route has very nice views in good weather heading our of T.Bay but once you go past South Stack your into the top end of Holyhead and city (type) traffic situations. The route is probably a good one to take in the coast line and have a quick visit upto South Stack. (http://youtu.be/JipN0yCUeNk)
Tight narrow twisty roads, no much fun on a big bike, but it is senic in places.
Do this both ways for maximum fun
A lovely technical route, lots of twists and turns down a national speed limit route. Some parts open up where you can make progress to the speed limit with gusto.