Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Sent it back: unsafe and uncomfortable

I received this pack recently and had numerous complaints:1. The sternum strap doesn't even come close to closing. I have a chest and the strap wouldn't close below my chest or above it.2. My shoulders were killing me within minutes. Could be that the sternum strap provides the extra support needed to take the strain off of the shoulders3. The button for the stand deployment is at the top of the backpack and there is absolutely no way to close the stand when putting the pack on and no way to deploy it while wearing the pack (unless you have someone with you to do it for you). I tried again and again to deploy it while wearing the pack and there is just no way to do it. This is dangerous.This backpack went back immediately!I returned it and got the Cross Terrain Carrier by Evenflo. It is comfortable, fits nicely on me (the sternum strap fits too) and the baby and the kickstand is easy to deply and has a pull cord to retract it, once the pack is on.