Fox's arn't half as dangerous as they say, Yes they can do crazy speeds on the motorway & past 70mph the steering does start to feel light, anyone who tries to give you an accurate speed is guessing as the speedo doesn't go up that high.
In my 8 years of service experience with fox, I have never seen one roll over as long as you respect them they are safe. We had one slip off the edge of a track in germany, it slipped sideways for more than 30 yards down and embankment of over 50 Degrees without rolling & could still be
driven down into the valley.
Safe yes, reliable well thats a different story.