We used to carry a backpacking hammock, but never did use it much. They're not really comfy for sleeping, to me anyway, but it was nice to lounge on the foredeck in the breeze.
If the cat at the end of the OP's name means he'll be buying
a cat, a hammock might be more comfortable on a cat than a mono. But to control movement at sea, you'd need swinging room, and that doesn't go well with storage
. I think one is better off in a snug sea berth, with a lee board or lee cloth. At least, my body wants to feel secure, not like "down will come baby, cradle