Just a quick update:
I have been drinking this for a couple weeks now. The taste is growing on me but my initial reaction was "too much sweet cherry." I have only been brewing for a year so my experience is quite low. There are some things I have learned lately that would influence how I would do this beer differently the next time.
I should probably start by saying that I did not follow Magno recipe exactly and I am sure his batch turned out different/better than mine. I am very glad he took the time to post this because it is a great beer.
Next time I would use around 40 oz. of cherry concentrate. It was a little too pronounced in mine. I would also concentrate more on getting a good fermentation going in the first place. Make a good yeast starter and oxygenate better before pitching the yeast. Mine ran out of steam too early on. The gravities were ok, but I think I could have done better. I also think I would have used more of the cocoa powder during the mash. I ended up not putting it in secondary and instead kegged it straight from primary. I did not want to do a secondary just for the cocoa so I left it out.
On the other hand, my neighbor came over for some free beer last night. After 3 pints Chocolate Cherry Stout, I was feeling like Superman.
So it is good and drinkable as is.