Narbiks workbooks for CCNP?

in CCNP
Hey,
Just wondering if anyone have used Narbiks workbooks for labbing CCNP topics?
Looks like they contain just about what you need to be able to configure + some extra.
Just wondering if anyone have used Narbiks workbooks for labbing CCNP topics?
Looks like they contain just about what you need to be able to configure + some extra.