i purchased one less than a year ago, used it a lot, until recently when the front wheel fell off. when i took it in for service, they said they had just seen another unit come in with the same problem. (front axel damaged by wear).

i think the frame and chassis of the unit may be “robust”, but some of the other parts (wheels/axel) are not engineered for the relatively heavy loads and strain of carrying two babies.

i will say that my unit gets used outdoors in a variety of weather conditions and i live in an area with pretty bumpy sidewalks. otoh, my twins have just passed 20lbs/each, so all of my use so far has been with a relatively light load.