I have a Scootababy but I rarely use it. It would be excellent if I had a lot of walking to do and needed both hands and did not want to take my lo in and out. It is extremely comfortable and truly hands free.
I have a tendency to keep the carrier on my body while I pop my children in and out as needed so the Scootababy is a little bulky to keep on with no one in it. I used it through an airport once which was fantastic, but then kept it on in the airplane which was just uncomfortable.
That is why, for almost five years, I keep going back to pouch slings. I use a Slingling for both my girls who are now 14 mo and 5 yrs. They ride on my hip, hop in and out and I barely notice it when they are not in it. For me and my needs, it is the best hip carrier I have ever had.
I also have a Hippie which is a little shelf on a super sturdy belt that your lo just sits on but that also requires a hand to support them so not really hands free (like the pouch sling). I use that frequently for quick grocery trips. The girls LOVE it.
In my experience, if it is close to effortless we use it, otherwise it sits in the closet.
