I bought the M25 250A 15Ft model for my Millermatic 200 mig. It replaced an old Miller Roughneck torch that required a lot more effort to maneuver.I debated for some time over which mig gun to purchase. Eventually, based on reviews on multiple websites, I determined that this Happybuy model represented everything I was looking for with respect to length, capacity, availability of consumables, ease of use, value and quality.I have not been disappointed. This mig gun was an absolute breeze to install with no issues. Some others have reported wire feeding problems at the handle and low gas flow. Perhaps those may have been a different model. Whatever the case, the unit that I purchased has neither of these problems.It was shipped with an 1.2mm (0.045) contact tip which I changed out to a 0.9mm (0.035) tip to match the wire size I use. After installing the gun, I let the gas purge for about 5 seconds and started welding. From the very first weld this mig gun has been a pleasure to use and produces high quality welds. It is comfortable in the hand and easy to move into position. Pivots great at the machine end and the handle. The cable is flexible, appears to be good quality and the trigger is very positive.It took 4 days to arrive here on the west coast of Canada. I paid less that $100 delivered which I consider to be an excellent value. Overall, this is a great choice if you are in the market for Miller M25 250A style mig gun.
gianni 
