I've only had a it a few days and used it twice but I cranked out more wire pieces to make our harnesses then I would have in two days of cutting and stripping. Accuracy is FAR FAR above what I can do by hand. This machine says it only goes to 8mm wire but I made a feed tube that is 10mm ID so we'll see if I can strip some 4AWG welding wire today!
Only things I noticed:
Definitely want to turn the feed speed DOWN unless your standing there feeding the spool of wire by hand. It yanks on the spool pretty violently when it feeds. If you had wire fed from a vertical barrel type setup that would be ideal.
Second thing is the manual basically SUCKS.... really bad translation. Maybe I'll make a configuration video in the future, once I figure out the multi-segment stripping :)