A548 - N Wales - Safe to ride?

Might seem like a silly question if you ride it regularly, but I went on the first section on the A548 yesterday, through Deeside industrial estate and over the bridge and then back up to Connah's Quay (which was obviously fine). Next week I want to go down from Deeside to Prestatyn along it, and I just wanted to check it's not too dangerous for cycling?
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I would always go inland a few miles and pick up the more picturesque lanes and head out to Prestatyn that way.
*most seemed to be quite littered with gravel/mud/stones and were quite steep.
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I live over there as well, and it does look nice from Parkgate, doesn't it? :P
I know it's not the nicest road but I think it's just for ease of planning my route I was looking at that. I have looked into coming inland a bit but I don't like taking maps out with me (not that i even have a map!) so I want a route that's nice and easy to remember.
Good luck on the route, I have fairly good local knowledge so if you need any more help let me know!