Didn't realize the gear range for Advent X till now. The 11 spd is like SRAM and Shimano with options for 42 or 48. Kind of like less gears if the jumps aren't too big. I just have a bunch of 11 spd cassettes already. Guess I'll get some 11s and report back soonI've only had experience with their Advent X and I like them. If their 11 or 12 speed system works as well as their Advent X (10 speed) then they'll have a winner and a competent competitor to the Deore and NX.