This product is a Great Idea -- it allows you to use a single stroller you already have and convert it into a Sit n' Stand without much extra bulk. My son absolutely loves to sit on it, it's very easy to steer, and it's very easy to attach and detach as needed. It does need some improvements. The issues I have are as follows: There is no place for kids to "hold on" while sitting, except the sides; however, since the sides are not real handles, it would be fairly easy for a child to let go. The next issue is that there are no safety straps to secure a child -- so while I push the stroller, I'm always concerned that my son may fall off. Thirdly, the seat takes up extra space in the front of the stroller and without being able to also elongate the handle bars on my stroller, I am constantly bumping my shins into the attachment. I think the manufacturer should consider making a handle extender. I recommend waiting until they improve this product with some extra safety features -- in the meantime, go for the Caboose or Sit n Stand.