Mine works pretty well in my sim. I have noticed a difference in handling between the regular and tower models. My regular model is a pleasure to drive, and turns smoothly. The tower model, ... not so much. I've applied performance tweaks to the regular one, that the tower model didn't get. All the boats behave slightly differently from one another. But all work in P3D, at least up to v4.3 and probably 4.5 and 5 too. But I don't own those.
The flag is a "Malibu" thing, or DS design, I think. So I left it there and worked around it. I like it too, though.