I use the full KO system for single and double deck. Was considering fully learning UAPC. The index numbers seem to be the biggest challenge. Before I put all my effort into that, I was wondering if there really is a big advantage to using UAPC vs. KO for single and double deck games? KO book seems to say the "trouble" of learning and using it perfectly is not really significant enough to warrant the "mind work" necessary in real casino atmosphere play. What do you all think? Thanks.