Terracycle stuff is VERY good. They would be my preferred solution.
We'll see how the Cyclestar works out in the current position, first. It's a bit small, but its a very tidy solution, and the couple of washers and bolt required are a fair bit cheaper and lighter than the Terracycle stuff.
The Cyclestar went droopy on our ride today, but at the ball joint, not the mounting (which is still nice and solid, as is the mudguard bracket it's bolted on to). I don't think I'd done it up especially tight to start with, so have nipped it up properly. We'll see how it goes - I know the one I have on the Streetmachine occasionally benefits from having its ball joint tightened after getting bashed about on trains, but is otherwise well-behaved.
Today's ride was 20k, half of which was on real roads with lumps in. Barakta had a hard time on the climbs, but seems to have got the hang of the front shifter (after an epic chain-suck incident on the first attempt to change out of the granny ring that required the removal of the chainring guard to un-jam), if not actually the use of gears. She seems to be coping with traffic okay, considering that she was barely riding above walking pace for much of the time. If anything her road positioning tends to the overly assertive, which around here is liable to lead to excessive hooting and shouting abuse, but relatively little splatty death. She needs to learn the art of looking like she's making an effort to keep left, while still being far enough out to prevent overtakes at pinch points (thus causing the driver behind to think the road is too narrow, rather than there's a cyclist in the way). It'll come.