We've used cedar shavings for about five years now. It's worked very well for us and I recommend it.
The smell is wonderful
Hardly any odor in the toilet...we also have a black
solar air chimney flue.
We have two outdoor compost areas both about 2m square.
Bins are 60litre, and we have a
urine diversion funnel. Some of our urine gets poured into the humanure heap once it's outside
We swap between each compost area each year and we use the resulting compost after three years, just around
trees.
We switched to Poplar shavings about a month ago, because of a supply issue, but suddenly we have lots of smell and an uncontrolled infestation of compost flies inside the bins before they're full.
We also have the same flies problem in our food compost bin, where there's the same sawdust in smaller quantities.
We're going back to cedar to check this is the issue
I'll try to remember to post results here.