the title says it all

Not used a lot because the leaves are big and difficult to reduce.
Grown for the flowers, but I have never seen a good bonsai out of it.
Google it, I did:

In nature they grow very straight and very tall. They were used for ships' masts way back when.

There was one growing outside my window when I was a kid. They have a huge number of flowers, which are bigger than the leaves. I thought about making a bonsai, but every single book, etc., discouraged, so I haven't.

If you like the flowers, go for it.