  Good tracking requires significant quintessence energy fraction, even in the
past, but a potential that is not yet truly slow-rolling. The supernova bound
on cosmic acceleration excludes constant equation of state and inverse power
potentials, but allows the SUGRA potential and other good trackers, in which
quintessence energy domination and kinetic energy suppression {\em both} began
only recently. This makes the time in which we live special in {\em two}
respects.
