We bought the Indie stroller first which is infant-ready and our infant liked it but his head wobbled a bit while walking at a normal speed (we live in an old city neighborhood with very broken sidewalks), so decided to get the bassinet and cotton insert. Totally worth it! It's nice to be able to see the baby fully and face him with the bassinet.
Note: for super sunny days sun does get in so we had to purchase a separate sun shade - not the case with the huge stroller sun shade which completely blocks sunlight, we have found.
The baby loves sleeping in it more than the crib.