Love the cold brew coffee! If you've ever had a great iced coffee beverage, it was likely made with the concentrate produced by the cold brew method. Without the heat you get a really smooth coffee flavor without the bite. The drawbacks are having to prepare it at least the day before, and you use more coffee than you would with traditional brewing methods so it isn't as cost-effective...
I make cold brew coffee every now and then. I don't do it very scientifically... I fill up my grinder with beans, hit it a couple times for a coarse grind, dump that in the french press, then top off with water and let it set 12-24 hours on the kitchen counter. After that you can press the grounds to the bottom and pour your concentrate into a vessel to keep in your fridge. I've heard folks say up to a week but it never lasts that long at my house! I did own a Toddy maker 20 years ago but it got lost along the way. If you Google around you can find all sorts of inventive ways people have used to produce cold brew coffee. I like the french press because it is inexpensive, effective, easy to clean, and multi-purpose...
I added a full french press worth when I bottled my Breakfast Stout 'clone' a couple weeks ago. Ground coffee had already been added at flameout - this addition just gave it a little extra kick. The guy I split the batch with did a "dry coffee" addition instead (secondary on top of coarse ground beans) so it'll be interesting to compare...
The cold brew coffee is concentrated which makes it great for camping. Whip some up before you leave home and pour it into a Nalgene to keep in your cooler. In the morning you just have to heat up water to make a hot cup of joe, or maybe some milk for cafe au lait. If you don't mind your coffee strong, it's also tasty as-is! Without the heat during the brewing process you get a really smooth final product. Delicious!