I do have this exact bag and use it very often, as carry on, for my vacation trips, as my only bag. I have used it for a 3 week vacation, everything I need, fits in there.
Pro's: Its carry on size on all airlines I have used so far.
Its stylish and looks upscale while on vacation.
Cons : The back of it does not breathe at all , as there is no wire mesh. I noticed in hot climates, while walking through airports, my back feels hot and sweaty and that is a really uncomfortable feeling.
For that reason, I will never bring a Farpoint 40, on a long walking trip. You need to pay attention to the back of your backpack. If your plan is, to every day send your pack ahead, then it will work, otherwise, the Farpoint 40 is a really bad choice for the camino.