Very impressed with this Trixie bicycle trailer. It is well made, sturdy & easy to assemble. Being made in Germany, the flag at the back is on our pavement rather than than traffic side and the trailer sits slightly to the left of my bike which means I have to cycle enough distance from the curb to clear it. Neither of these have proved to be an issue. One of the tyre valves was faulty & Canine Concepts have been very happy to reimburse the replacement that I bought. I first purchased a small size for my working Cocker Spaniel (12kg) which seemed on the snug side but which I have decided to keep. Tried a medium as well, but that was too big with room for her to slide around. She has become accustomed to trailer travelling quickly & we have done a short maiden voyage on our first attempt. She even settled down to a snooze, when not sitting with the smells wafting past her inquisitive nose! Am looking forward to some longer cycles.