  The class of quantum states known as Werner states have several interesting
properties, which often serve to illuminate unusual properties of quantum
information. Closely related to these states are the Holevo-Werner channels
whose Choi matrices are Werner states. Exploiting the fact that these channels
are teleportation covariant, and therefore simulable by teleportation, we
compute the ultimate precision in the adaptive estimation of their
channel-defining parameter. Similarly, we bound the minimum error probability
affecting the adaptive discrimination of any two of these channels. In this
case, we prove an analytical formula for the quantum Chernoff bound which also
has a direct counterpart for the class of depolarizing channels. Our work
exploits previous methods established in [Pirandola and Lupo, PRL 118, 100502
(2017)] to set the metrological limits associated with this interesting class
of quantum channels at any finite dimension.
