Things only get 'hairy' at speed, if you take your time they're easy to ride. i know someone who has a reverse cargo trike (2 front wheels) and that is lethal at over 10 miles an hour as it shimmies like it has a hinge in the middle which it does in fact have cos the whole front end turns, very disconcerting when I had a go at the 'Ride Leicester' event but it will carry over 100kg in the box (the guy works for Spokes and had half a dozen or so Gazebos that he put up at various locations around the route all of which fitted in the box at the front)