Pros: Adjustable for any adult or child, comfortable, attached storage
We bought two of these carriers for our trip to Colorado. Our youngest boys were 22 months and 6 months at the time and we had planned to do quite a bit of hiking and site-seeing. Not relishing the idea of pushing a double stroller through the mountains, we began the search for carriers that would give us better mobility without breaking our backs.
We took the plunge with the Evenflo Trail Blazer. We debated between this one and the other model without the hood, but decided a hood would be nice in case it started to rain or snow during one of our treks. When they arrived, we gave them a test walk.
I'm 5'6" and my husband is 6'. We were both able to get very comfortable fits thanks to the highly adjustable straps. The padding kept the packs from biting into our shoulders and it also made our little ones more comfortable. The real test came when we put the children in.
My husband carried our 30 pound 22 month old and I carried our much lighter 6 month old. We had two major concerns, would the pack be too uncomfortable with the weight of our 22 month old and would our 6 month old drown in the seat. We soon discovered that we wouldn't need to worry about either issue.
The padding I mentioned before made for a comfortable ride for father and son and also kept our youngest from jostling around in the seat (he was even able to fall asleep comfortably.) The toy hooks kept them entertained (as did pulling on my hair) and the pouches on the back freed us from carrying any additional bags. We were easily able to fit enough diapers, snacks, bottles, and sippy cups to take us through our treks.
While we haven't used the packs since our trip, we do plan to use them for all future ones. I prefer my sling for day to day use, but for long walks through un-stroller friendly territory, these packs are a must have. They made our vacation enjoyable for us as well as our children and that's saying a lot for a family vacation!