Definitely won't save money compared to buying your own beans. It's the same as cooking - it's cheaper to grill a nice steak than buy one.
As a music festival goer - Sudden at festivals is about taste and speed. It tastes amazing. I usually pour it in a cold water bottle and shake it up (while in the middle of a performance) - really awesome. Definitely tastes better than festival coffee. Furthermore the coffee line at festivals is usually 30 minutes and they charge $5! This is obviously a personal pain point for me :-)