The useful transfer is the one that already knows your flight number. We book cars against the landing time, with a buffer for baggage, and a number to call if the belt is slow.
For groups and late arrivals, chauffeur-driven cars with a name board remove the negotiation at the kerb. For early domestic departures, we plan pickup from home, not from optimism.
Add hotel transfers on the same file so the journey is one sequence, not two vendors.