I'm curious if anyone in this group has any experience learning and using Speedwriting.  It's always kind of appealed to me, but the few times I've looked at it it seems like there are some logical problems with the system.  (For example, retaining the letter "c" which has no phonetic value). 

Did the Speedwriting system change with the different editions the same way the Gregg and Pitman systems did? 

(by alex for everyone)