So before I had my Hybrid I had a few different brand carriers. They worked "fine" but a few hours using them my back was in pain, my son was dropping, I had to either readjust or even re-wrap and we were just both were just over it. It's been a different experience since I got my Lenny Hybrid. It's soft and cozy for both my son and I, beyond secure but movable for my son while in it and no more back pain! I love this carrier style. I feel like the Upgrade is a bit more practical for on the go but I need them both for different times equally. Thanks again Lenny Lamb/ Mama & Roo's for giving us a positive carrying experience everytime!