For tight city living pick a stroller that folds compactly and carries easily with a center grab and built in handle or strap and opens and locks in one motion, has soft shoe friendly brakes, sturdy wheels for sidewalk cracks, and a near flat seat with a harness that supports a smaller rider. If you can fold it one handed while holding a coffee and wrangling a kid you will glide through turnstiles and daily park runs without stress.