I've used it in the past. Can't really say it is better or worse than etex. It SEEMED to be a little more brittle, but that could be perception more than anything.
Good judgement comes from experience, and experience comes from bad judgement -- Keith Benning
I've got some flexcoat lure epoxy. It was sent by a Flexcoat employee to try. He claims it's flexible and hard. We spoke for a while by phone on the product. They are very informative and helpful. Once I get a chance to use it I will post.