I have used an amby hammock with 2 kids, and loved it. They both were unsettled as newbys (colic/reflux/food intolerances) and the hammock was great for being able to bounce them without having them constantly in arms.

I haven't used a capsule, they look too heavy for me (no experience remember!), but make use of carriers. will have a hugabub so i can wear it, and pop baby in when we get to destination, and out again when back in the car.