  We show that "Quantizied Nesting" model misses important features of the
magnetic field-induced spin-density-wave (FISDW) phase diagram. Among them are:
1) the FISDW wave vector is not strictly quantized; 2) in some compounds, the
FISDW diagram consists of two regions: a) at low temperatures, there are jumps
of the wave vector (i.e., the first order transitions between FISDW phases), b)
at high temperatures the jumps and the first order transitions disappear but
the wave vector is still a non-trivial function of a magnetic field. These are
in agreement with the experiments on (TMTSF)2PF6.
