On the whole, this is a good bike trailer. I have only used it as a bike trailer. I used it with a 20 pound/9 kilogram child. I used the trailer on paved roads and on hilly gravel roads.Folded up and without wheels, the trailer and tow bar fit in the back of my liftback subcompact car. There is little space for anything else.There are some issues you should be aware of:- The rear reflectors do not reflect well. They are terrible. The front reflectors are not much better. The white labels on the back of the trailer are actually much more visible than the reflectors. The wheel reflectors are okay. I strongly recommend purchasing lots of lights to put on your trailer and bicycle. Spoke reflectors are also good. My personal setup has ten lights.- The Schrader valves on the tubes that came with the trailer did not work. Burley sent me replacement tubes. The replacement tubes are okay.- The crotch pad on the harness detaches very easily. I used some cable ties to hold it on so it does not get lost.- The manual says the black thing on the front of the tow bar that looks exactly like a handle is not a handle. The manual is right. It is not a handle. It was foolish to make it look exactly like a handle.- The harness needs to be quite tight or else your child will flop over. It is not hard to tighten.- It is not possible to release the brake while holding your bicycle. You need two people or you need to release the brake before picking up your bike.- It stays warm on cool days. I have not tried it in the heat but I would guess you need to be very careful to keep your child cool.- The tow bar is not keyed, so it is possible to insert it into the trailer with the wrong orientation. It is possible, but difficult to fix this.- My trailer came with the flag holder installed upside down. it was easy to fix, but you need a hex key.I have been using the 16+ wheel kit with the trailer. The Schrader valves on that accessory worked well. It's not obvious to me that the 16+ wheels help my baby or help me tow the trailer, but they at least look like they make the ride more comfortable.The folding mechanism works well. The trailer handles well (no super sharp right turns, though). Hitch installation was easy with my quick release wheel.