I used an Amby baby hammock for DS1's day naps and it was brilliant. But DS2 hated the hammock so he went straight into his cot.
We had the exact same thing, DS1 loved the hammock and DS2 hated it so went straight in to the cot.

I found it invaluable with DS1, he just loved it, I wish DS2 did, he might sleep better in the day that way.