When I connected the handle to the upper frame, it felt really loose and flimsy, no matter how tight I made the screws. I was fairly certain the frame would fall apart upon rigorous use, but, unfortunately, I never got the chance to find out as there were no holes to insert the screws to connect the upper frame to the lower frame. (Note: Amazon will pay for the return shipping, which is great since it's not Amazon's fault, getting my mail carrier to take a large, heavy box in his already full stroller is a little ridiculous, but it's that or take two buses and wait on a long line at the P.O.)