I've been loving my Dominant G, D, and A, and finally decided to get the E to replace my D'Addario Pizz. Picked one up at Shar (down the street), and it broke while tuning up, despite all the usual precautions (graphite, vaseline, tuning up over the course of an hour or more). Hmmm. Went back, got another, and it broke, too. Great. Went back and got a Flexocor, which I'm so far not terribly happy with, but at least it didn't break!
The problem seems to be that the Doms have not nearly enough silk wrapping for their length, given that if the metal winds around the tuning shank they seem sure to break. The Flexocor actually has much less wrapping, but the metal wound around the shank shows no sign of damage, and it tuned up nice and quick.
Too bad--I love both arco and pizz with the Doms, but life is too short for a string that wants to break so badly. Time will tell if the Flexocor E is a good match, and I'll just hope my other Dom strings hold up okay.
EDIT: ThomastikMike, you wanted measurements, so here they are: a hair over 41 inches vibrating length, and about 49.5 inches from ball to the E-string peg. I'll also PM you with these.