Our first baby zen yoyo lasted 5 years through 3 children and had we done some basic maintenance on the wheels, it would still be going. They rusted to the axle eventually and we just got a new one - again, 5 years on! Also happy with the buggy board attachment. It is definitely the best buggy for hauling up and down stairs (we live on the 4th floor), the trade-offs regarding space never much impacted us. Good luck!