Just sharing something I tried last week and ended up loving with y'all. I have a Baby Jogger Versa and the seat is recommended for 6 months and up because of the not so flat fully reclined angle. I have been toying with options to make my Versa seat newborn appropriate because I don't want to buy the super expensive bassinet.
I tried the Coccoro infant insert and the Uppababy Snug Seat. Both were nice but the CCO in particular made the seat very flat and I was super surprised to see how perfect it was in the stroller. It wouldn't be secured at all which you'd have to take into account for folding but a great option. The Snugseat is nice too and overall a longer lasting option I think. I'd probably use that for a year or so just to make the seat smaller for a younger baby.
CCO insert
And the Uppababy Snugseat
I tried the Coccoro infant insert and the Uppababy Snug Seat. Both were nice but the CCO in particular made the seat very flat and I was super surprised to see how perfect it was in the stroller. It wouldn't be secured at all which you'd have to take into account for folding but a great option. The Snugseat is nice too and overall a longer lasting option I think. I'd probably use that for a year or so just to make the seat smaller for a younger baby.
CCO insert
And the Uppababy Snugseat