We had a trail angel for about a month the returned it as it was beginning to break up and it was very annoying to use.
I found it IMPOSSIBLE to get the clamp around the towbike seat post tight enough to stop the clamp rotating as we rode. As a result my wee lad kept ending up canted out to the side. We literally had to stop evert km or so to realign it. The seatpost ended up squashed as I had to tighten it up so much. The supplied shims to protect the post and the kids bike frame are CARDBOARD. Enough said…
Also the large plastic joint began to crack.
In theory it is a great idea, let down by a poor method of attachment to the towbike.
We replaced it with a Follow-me Tandem. At £210, it is not cheap, but it has been excellent so far. It is robust, stiff, and easy to use. The kids bike can easily be detached and reattached, allowing them to pedal on their own when suitable. I hope to get many years of service from it.