I grow this and have had it for years. The white is very pronounced. It grows well, increases fast and blooms alot. It is pretty planted with cream or white next to it as it compliments the edging. It is about 18 inches tall for me. It doesn't mind being moved. (some dl sulk) The blooms are always perfect, no splotchiness or trouble opening or anything like that, even w our cool mornings. I also grew it for awhile in partial shade and it did great.
It has a rich velvety color and texture.
I would not want to part with it.