Yes, I use one. Though I built my own from tube steel, and wheel chair quick release wheels. I used 1/8 inch cable for the bed like a net. It will carry a good bit of gear in and a deer out quite well. I tie it off to the back of my belt and being pretty well balanced, it rolls along behind me at just below hip hight. (Note; The bigger the wheels, the smoother the ride. and the easier to get accross branches or rocks) With a 300lbs man strapped to it, it takes one hand to balance and roll on concrete. Pop the wheels off, lay it flat and cover it with leaves, and it is gone! Easy to hide. If intrested let me know and I will post pics.
The only real difference between a good tracker and a bad tracker is observation. All the same data is present for both. The rest is understanding what you are seeing.