Joan senior is a great near-white with a nice, thick scape and bloomed well even though I transplanted it twice after purchasing it. It's a toughie.
It has a good deal of green undertones to the bloom, but gets a pretty, near-white color after a few hours of direct sunlight. It had a relatively long bloom time and the blooms have a good consistency.
It isn't my favorite near-white, but I am still glad I have it. It is very pod fertile and it's definitely pollen fertile. Aside from my Royal Frosting plant, it is probably my most fertile near-white. (It beats out Titan of Ice, Gentle Shepherd, Lyonnesse, my near-white-NOID, and possibly Heavenly Angel Ice.) Keep in mind, though, that all of these are first-year plants for me, so this all relates to toughness and fertility for first-year planting.