  Through transport, compositional and structural studies, we review the
features of the charge-density wave (CDW) conductor of NbS$_{3}$ (phase II). We
highlight three central results: 1) In addition to the previously reported CDW
transitions at $T_{P1}$ = 360\,K and $T_{P2}$ = 150\,K, another CDW transition
occurs at a much higher temperature $T_{P0}$ = 620-650\,K; evidence for the
non-linear conductivity of this CDW is presented. 2) We show that CDW
associated with the $T_{P2}$ - transition arises from S vacancies acting as
donors. Such a CDW transition has not been observed before. 3) We show
exceptional coherence of the $T_{P1}$-CDW at room-temperature. Additionally, we
report on the effects of uniaxial strain on the CDW transition temperatures and
transport.
