"It is not particularly good for a CDA nor a holding pattern descent, just useful."
Use V/S exclusively during CDA's. Every pilot I've flown with does also.
Also use it during minor altitude changes (holding patterns, 1000' altitude changes, etc)
Also use it during climb/descent when ATC says "expect higher/lower in X minutes/X miles". Rather than blasting at climb/idle power to level off and then resume the climb/descent many folks prefer the technique of reducing rate of climb/descent to avoid an unnecessary level off. "Technique only"
