DocSearch is great and I especially like the expanded preview that shows up in the new version.

Shameless plug: for when you get to a point where Algolia becomes too expensive, take a look at Typesense which is an open source alternative to Algolia: https://github.com/typesense/typesense

Has an integration with InstantSearch as well: https://github.com/typesense/typesense-instantsearch-adapter

This search new experience is so well designed and so fast... I'm blown away.