I cant speak for the Krill models, but I own and have assembled several comp arf models includeing the Extra and can say you would not be dissapointed with the 2.6 C-Arf Extra. Just go to any IMAC event and you will probably see several people flying them, and you can see for yourself. There are several build threads here and on other sites on the 2.6 C-Arf, if you want to see from start to finish whats involved putting one together. I fly in the Northern-SE section and their are lots of people flying C-Arfs but I cant think off hand of anyone with a Krill that you could ask questions to. Only thing negative i can say is ( the C-Arfs) cost so ?+!! much. Good luck with whatever you decide on.........Gene