Short answer: Mostly yes for safety and on-time performance, but reliability (punctuality, cancellations, customer service) is mixed.

What I found

• FitsAir is an active Sri Lankan carrier that says it follows SLCAA/ICAO safety standards and is audited by the Sri Lanka Civil Aviation Authority. (FitsAir.com)
• The airline publicized a strong punctuality record (Cirium data) — it was reported as Asia’s most on‑time airline for July 2023. That suggests good on‑time performance at least for some periods/routes. (FitsAir.com)
• I could not find any record of major accidents or hull‑losses involving FitsAir in public aviation databases or news reporting. That supports a clean safety record to date. (FitsAir.com)
• Passenger experience reports are mixed: some travellers report on‑time, trouble‑free trips, while others complain about rigid baggage enforcement, cancellations, and slow refunds/customer service. These reviews suggest variability in operational/customer-service reliability. (Reddit.com)

What that means for you

• Safety: there’s no public record of serious safety issues and the airline states it complies with national/international standards. For absolute assurance you can check the Sri Lanka Civil Aviation Authority (SLCAA) and IATA registries for the airline’s current audit/oversight status. (FitsAir.com)
• Operational reliability: generally good on-time performance on some routes, but as a smaller/newer low‑cost carrier it may have less schedule redundancy (fewer alternate flights) and customer-service problems when disruptions occur. Expect stricter baggage rules and check the fare/refund terms before buying. (FitsAir.com)

Practical tips

• Before booking: check recent reviews for your specific route/date, confirm the aircraft/flight number, and read the fare/refund/baggage policies.
• Day of travel: arrive early, weigh carry-on if possible (some passengers report strict cabin-weight enforcement), and save their customer‑service contact info.
• If you want, I can check the latest status for a specific FitsAir flight, or look up whether FitsAir is IOSA‑registered or has any recent regulatory actions.