Pros- good for quick outing. Can fit 2 diapers, pick of wipe and sippy cup or bottle- or small toy. Light.
Cons- we bought for our always running toddler. The leash on the bottom is bad idea. Would only do on top. In less than a minute with the bottom, my son tried to run, fell forward, smacked his mouth and had a bloody lips. We have not used it as a safety harness since. Decided to rack up those fit bit steps in public instead. Also too small for a regular sized toy or stuffed animal. Mesh in from is for light toy or small stuffed animal only. Bottle or sippy cup that has liquid will fall out. Side pocket can barely fit a bottle. My son is 15 months- this looks small in his back.
We use it if we are going to a restaurant or park and don’t need the whole shabang. Which is why I gave it a 3. It’s convenient that way only in my opinion.