Which mode?

Memory consumption:

LCAO < PW < FD

Speed:

PW > LCAO > FD (small systems)

LCAO > PW > FD (large systems)

Absolute convergence:

PW > FD > LCAO

Egg-box errors:

PW < LCAO < FD

Features:

FD > LCAO > PW (old features)

PW > LCAO > FD (new features)