I like my skottle, and I'm happy to see there are a few different options available now. It's perfect for the type of cooking I do while camping (agree with everything Fireman78 said) and I use it at home, too. I compared the footprint of the unit when packed with my Coleman stove and multiple pots/pans and decided it was also a space saver (for me - YMMV). Fortunately I was able to work one into my budget without selling any vital organs. I feel bad for BPD53 and his tenuous financial situation. Maybe we could take up a collection to help him out?
"Other than size/weight savings, what does the skottle give me, that a nice big frying pan and a Coleman stove do not?" It is quite literally a big frying pan so there's really no other advantage.