I put one a few days before heading to the Moab 35th Anniversary run. I have had CSF, and just replaced a Champion that I had no issues with. I wanted more cooling capacity since I was pulling a trailer with extra gear for the misses and kiddo and running one of Russ' deluxe strokers. I should have weighed it at the scale but didn't make the time. I have installed Mishimoto radiators, aftercoolers and oil coolers in Kawasaki Loaders and Link-Belt Excavators as they are OEM and have been consistently impressed with their quality.
My initial impression of the build was an improvement over the Champion but would hope so at 2x the price. Fit was off a bit, but was within adjustment of factory radiator support/ header mount. Just seemed torqued over to driver's side compared to how the Champion radiator was installed. I was a bit irritated with the A/C condenser brackets and lack of nuts since I was on a time crunch. I ended up cutting and drilling some 14g sheet metal brackets with proper size holes so I wouldn't have to use fender washers. I wish the cap was standard size, now I will need to get another adapter to pressure test my cooling system. Speaking of pressure, since it runs at a higher pressure I see coolant weeping at the factory spring clamps and will have to change them out. The threads on the neck for the overflow nipple ended up galling and had to be chased with a tap and die on the nipple to save them. I'm not sure if there was a burr or what, but was happy I didn't have to go to an oversize hole or something else.
Performance, ambient temps were 80 or less, so no where near extreme but had several long grades to climb and had no issues. Between higher cap pressure and greater cooling capacity it definitely ran cooler than experienced previously especially with the trailer. Coolant temps on oem gauge indicated 215 max. I did change from the conventional ethylene glycol based coolant to a OAT coolant after several coolant flushes. I would guess weight of loaded trailer/ gear at 1800 lbs. So far, I do like it.