It is nice but it really doesn't stack well on itself at all.

To be more accurate if you are ok with a wooden walkway(the top of the staircase) between the first and second staircase then that does work pretty well.

However if you would like a continuous white staircase then you run into a couple of issues..... the posts at the bottom are closer together than the posts at the top and the base has a curved extra piece of stone, which then sticks out either side at the join. Also getting the stairway to function without your character getting stopped at the join requires quite a bit of precision fiddling with.

It is aesthetically more pleasing than it's Clockwork alternative but the Clockwork one stacks on top of itself perfectly so much more easily.

Edit:- For fairness! You can have a continuous white staircase but the easiest way I've found is to not try and align the top and bottom posts but to instead leave a gap between them, which tbh bothers me a bit but I can think of some potted plants that would fit in that gap.