We have completed a few SIDs and I have to say , they are well worth the effort and cost.
Cessna consider compliance mandatory for all aircraft regardless of type of operation, and it seems the soon to be released CASA policy on SIDs will state the same.
It is now part of the Service Manual for the aircraft - not a separate (optional) document. It forms part of the manufacturers Instructions for Continued Airworthiness.
Hard to believe that in some red neck regions MROs are telling people that it's optional. 200's by 30 Dec 13 and 100's by end of June 14.
CASA MAY give an exemption in time to allow people to catch up. It is true that a Cessna without SIDs is worth a heap less.
Remember when we used to have Major Inspections.....? SIDs for your Cessna is a bit of catch up since it was last looked at 'properly' ie when Major Inspections were cancelled.
For those Mooney/Beech/Piper people out there, CASA may (it seems) also introduce an ageing aircraft inspection program soon to cover these aircraft. Seems we are operating these aircraft way beyond their intended life span.