I used full caffeinated. I don't use decaf products. The coffee I used was Cafe Altura Organic Coffee, Biodynamic French Roast, Whole Bean, 32-Ounce Bag, I pretty much used the whole bag. I put it in a 6 gallon stainless pot to brew it, then I added my sugars, then I open fermented it for a few days, then I racked it to the carboy.
Ale yeasts might work very well. I didn't use a beer yeast because many of them you need to keep a bit cooler than room temp to avoid off flavors and I didn't have a way to do that at the time.