I love Hot Lips. Even here in Zone 5B. It winters over indoors without missing a beat.
The flower form is neat in that it can be all white, all pink or some combination. Some of the coloration is caused by temperature changes, so a new flush may be different. On my plants, I often have all 3 color schemes at the same time.

Very easy to grow from cuttings. I have taken them at various times, and they always take. But I usually do it in Fall when I am cutting the plant back to bring inside.