I did this with a mead about 2 years ago. It is very good. I did this batch with Santa Cruz organic cider. At 2 years, the cinnamon has muted quite a bit, and marries with the apple taste very well. Here are my notes:
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Simple Cyser Recipe
1 gallon apple juice 100% pure no preservatives
2.5lbs honey
D47 or K1v yeast
Dec 17, 2005
Dean's Apple Cinnamon Cyser
1 gallon apple juice 100% pure no preservatives
2.5lbs of clover honey
1 4" cinnamon stick
1 tsp of Yeast Nutrient divided into 3 phases: Day 1, Day 3, and Day 6
Add to fermenter and mix it up. Mix REALLY good, as you will get stratification of sugars if you don't. I did this for about 15 minutes on a drill at medium speed.
SG 1.104
Pitched Lalvin D47 yeast. K1V-1116 will also do, as probably Wyeast liquid mead sweet or dry yeast.
Dec 20/2005 - SG 1.038
Dec 30/2005 - racked to gallon jug - SG 1.000 - finished?
Jan 27/2006 - tasted very clear cyser. Very dry and the cinnamon is definately there. Maybe too much cinnamon for a 1 gal batch. Will have to age to see what this will bring. Almost ready to bottle.