My kids have done both, brought their own and rented. When my Grandson was three, we rented, big mistake, the strollers did not recline and it was impossible to get him to nap in them. Last year at four years old, we hauled his stroller from Chicago. All the strollers in the parks had been replaced with new ones of a better design, and would have been perfect. The drawback to bringing your own is that you have to drag it on the transportation systems. The drawback to renting is the lines. My daughter says she likes renting better. Also, we left her stroller parked allover the place, full of our stuff, and nobody ever bothered anything, yes, they move them around, but that's all.