we have been using pg_textsearch in production for a few weeks now, and it's been fairly stable and super speedy. we used to use paradedb (aka pg_search -- it's quite annoying that the two or so similarly named), but paradedb was extremely unstable, led to serious data corruption a bunch of times. in fact, before switching to pg_textsearch, we just switched over to plain trigram search coz paradedb was tanking our db so often...
also shoutout to tj for being super responsive on github issues!