I've got a couple of Beall trees entering their fourth seasons. My trees have grown fairly slowly, so they haven't produced a large amount of figs - probably 10 total last season as one of the trees didn't do much at all. I don't usually keep duplicate potted trees, but this fig is so good I'm not ready to part with either until one has grown large enough to produce lots and lots of figs. My Beall's are a little darker than the one in FMD's picture, but I wouldn't call them purple.
Of all the figs I have tasted so far, Beall surprised me in a good way more than any other, as I hadn't read many testimonials about it's superior taste or seen it ranked among many favorites on the best tasting lists posters toss out to the board a few times a year. It's not a Col de Dame (but what is?) but in my climate it's an excellent fig.
Taste-wise, Beall is very sweet, one of the two or three sweetest figs out of the 30+ of my own that have produced figs so far. Super sweet is not generally a characteristic that ranks high on my list - I prefer complexity, nuttiness and a jammy texture with moderate sweetness - but it works with Beall, which, in addition to being very sweet, has that nutty taste I like and a clean finish.
I don't know how Beall performs in humidity, but in a hot, dry and sunny summer local, it's dynamite.