C&S gives seller protection as long as there is a scan at some point in the journey. Most of us find that getting a lodgement scan gives us that scan point.

I walked into my (non-preferred) major Ap shop today. Thye queue was almosat out the door. Took 10 minutes to get served.

I suppose it boils down to whether or not you feel your time is worth more than the cost of getting a neg because you can't prove postage.