I've never used a Thunder Creek trailer or any fuel/lube trailers, but did use a different brand fuel/def trailer when I was harvesting. Having enough fuel for 4 400 hp machines and bulk DEF was great. It was never fun for me when we spilt up and I was keeping 2 combines and maybe a grain cart going with the tank in the service truck and jugs of DEF. Apart from the trailer springing a leak 2-3 times a year, the only other problem was the way the DEF system worked. Unlike the Thunder Creek units, our trailer could not draw from IBC totes so we were pumping out of totes into the trailer tank. This could technically void the emissions system warranty as it wasn't a closed system before it went in the machines tank. Nobody from pro harvest or the local dealers gave us a hard time about it, but it could have become a problem.