I used to be very wary of any fluoro snapping on me, it did have a tendency to give way a lot, so I avoided it for years. I think a lot of the issues are with knots giving way, because the fluoro works best with a particular knot, or the knot has not been properly lubricated and wetted down.
It is only recently I got back onto it, and have had no problems while using a Uni knot.