We had a Chariot trailer, with the jogger and stroller kits. Of the many THINGS one needs to buy for an infant these days, we regarded this as the best of all of them. Yes, they're expensive, but when you're done with it, you can sell it for 60-75% of what you paid for it. Because of the large rear wheels, it makes a better stroller than real strollers, also. So you don't need to buy a multi-hundred$$ stroller.