I searched reviews high and low about the piggyback. I have found so many mixed reviews and I finally broke down and got it because I plan on taking lots of long walks this spring/summer (live in NYS) and have a 4 year old who needs a break every so often.It was easy to install once I watched a you tube how to fit it on just right. It goes up and down easily. Squeeze latch to get it down and use feet or hands to move it up when not in use.My fear was.. it will be too heavy to push with my older kids on there. False! Not as hard as I thought. My 4 year old rides it and I can even go up hill with ease. Now my 6 year old likes to jump on every once in awhile too. He weighs 50 lbs and is tall for his age. It is manageable with him.. obviously a little harder to push and a little more awkward to the point I have to take slightly shorter strides with him on there (I am 5'5) and sometimes do have to walk a little more to the side. With my younger I don't have that issue. 55 lbs is the recommended weight capacity so I'm pretty happy for what it does do even with an older child on there, it's not enough for me to complain. One thing with an older child (my 6 yr old) on there is that if they're leaning a certain way the stroller can lift up so be sure to always have full hands on deck. That's really only happened one time in the 2 month we've used it so far.I was also worried that my shins would hit the piggyback in the up position. I've read some reviews of that and it almost talked me out of getting one aaaand I do not have that issue! My shins have never hit.Does great on sidewalks and streets. We've only used it with my infant daughter facing me in a regular seat with infant insert. The boys hold onto her bumper or the sides and there's room there for all.Overall I'm happy with it and no regrets purchasing it. It does its job and helps out my little people on our adventures and makes things easier for me!