I have a Lincoln square wave as well, I only use the pulse because it helps with my lousy wire feeding, I was cursed at birth with no rhythm. I have been curious about pulsed mig but have never had a chance to try it. I am friends with the outside sales guy for the local welding supplier in the town were I work and he has brought several machines and hoods out for me to demo, I'll have to drop a bug in his ear and get him to bring one out when he can. is the pulse with mig to control heat input to the material only or does it serve other functions? It seems like it would be good for up hill to freeze the puddle to take out some sagging but I really haven't looked into it because it is out of my price range. are you liking it as compared to normal mig with c-25?