I did six month of research on pet strollers and I found Gen 7 Strollers to be the best I have ever seen - The product is of the highest quality and works exactly as described. I had great communication with Gen 7 before I purchased the stroller - they helped me pick the best stroller for me  - and got back to me within 24hrs (I selected "The Promenade model").  This company REALLY CARES about your pets and the functionality of your stroller.  I"m Tall (5' 10") and the 40 inch height is perfect for walking or running - the wheels are durable enough for walking pavement or packed dirt paths - and the stroller is elegant enough to take out to dinner or shopping at Saks!!  The "one hand push button" closure works for walking on a plane or putting in the back of the car.