Exactly what msb1766 said.
We used it for 3 years on a Nash 17K, 7,000 lbs. Moved it to our new Nash 26N, 8,800 lbs. Works great on both to take out bounce and sway. It works well for WD also although because I have a 1 ton truck, there was not a lot of evidence of it doing much with the 17K. On the 26N when both gray and black tanks are full there is more tongue weight. The black tank is 100% in front of the TT axles and the gray tank is about 2/3 in front of them. But the setup does just fine with it. I do tighten the chains more with the 26N than I did with the 17K and so far so good. I would think from my experience that the Anderson may not be the best if you had a heavy TT and a small tow vehicle, but that would not be good for other reasons too. I found it easy to set up and use and easy to move from one TT to the other.