Air Macau typically offers Business and Economy cabins (with First or Premium Economy on some widebody/long-haul routes). Cabins differ notably in seating, catering, baggage allowance and mileage accrual.
For short routes economy is usually the best value; on overnight or long-haul flights Business meaningfully improves rest. Watch for upgrade offers with miles or cash around check-in time.
Product-wise: Air Macau, controlled by Air China, is Macau’s sole home carrier, serving mainland cities, Taiwan, Japan/Korea and Southeast Asia. Macau’s compact airport means fast transit — often cheaper than routing via Hong Kong.
On loyalty: PhoenixMiles (linked with Air China) members accrue miles by cabin, and elite tiers add seat, baggage and lounge benefits — worth joining if you fly Air Macau often.