They have very pretty flowers, you just have to watch to make sure no kids try and eat them, although most kids except for the very young would leave them alone. I would expect that you would have to make sure your dog or for that matter a cat doesn't try and eat it. There are some flowering plants that are far more toxic that people plant never expecting that it was toxic, luckily they are tagging the plants and shrubs to let you know that they are poisonous, kids still die every year from eating parts of them.
It is in full bloom now and looks even more impressive.
Yes they are very deadly but many plants that are poisonous taste so bad that most kids wouldn't eat them.
I have no kids around and the dog doesn't mess with them. There are many deadly plants in the yard but I have never had a problem with any.