We love it, baby loves it!
We got this carrier while living in Europe so that we could travel with our baby. We started using it when she was 6 months old and went on a week long cruise and then spent a week in the Swiss alps. We used it on the cruise ship, on shore, on snowy hikes, and all the way up the Acropolis. My husband did most of the carrying and it did get a little tiring toward the end of the second week, but I was also able to carry it a fair amount. It's on the bulky side, but we managed to take it pretty much everywhere, even on the train. It has a ton of storage and really useful loops to hook toys (or pacifiers, snack cups, drink cups, etc) to. Our daughter seemed really comfortable most of the time. She did get a bit antsy when she was in it for hours, but she rarely objected to getting into it. It has a nice canopy that keeps the sun off of her head, as long as the sun is right above, in front, or behind her. For really sunny places we had to drape a blanket over the sides so that she wasn't blinded from the side. We continued to use this until we moved and don't do as much outdoor exploring, but we know we'll use it again once summer comes. I would absolutely buy this again. Oh, and with a little practice, my husband and I were able to get it onto our backs by ourselves.
North Pole, AK