"For me, the 6x12 simply doesn't add any functionality but weigth" (Thilo).
Sure, everyone is different in its approach, no problem with that. For me it was just the opposite - once tried, I quickly realised that I can take more pictures without the hassle of film holders and at a better price. Today I have 3 cameras made around the Calumet 6x12 RFH. Sincerely, I'm affraid I will start making the 4th one too... ;-) (Were it only of a better quality, since it needed adjustments...)