Are anti-colic bottles actually worth it?

Most parents reporting in the specialist subreddits we read say anti-colic vent systems (like Dr. Brown's internal vent or Philips Avent's AirFree vent) noticeably reduce gas, spit-up and fussy feeds for gassy or reflux-prone babies. For babies without those issues, simpler bottles with fewer parts to clean often work just as well. The trade-off is more parts to wash.