Just gorgeous!...and yes, they do smell heavenly. You seem to have the perfect place for it.
I have seem them become quite invasive. Do you find it springing up suckers a lot, or the seed being carried elsewhere?

Sue

I've heard some people say they have problems with them becoming invaisive, but I've never had any problems. The seeds blow everywhere (I leave the vines up all winter, so birds have a little windbreak to hide in) but I've only had a handful of volunteers. It's a pity, because so many of my visitors want a cutting or a seedling. Even if the seedling start to grow, I can hardly ever dig up enough roots to get a viable plant.

This is one of the volunteers that was lucky enough to sprout in a good spot. It's about 5-6 years old (nasturiums and sweet potato vines in the foreground)