I have the 3324 kit which is the same as the 3350 except it has 2" ball instead of 2 5/16". I put almost 4000 miles on it this last season and it has done a great job. It has been very stable and the sway control works well. My tongue weight usually runs about 450lb and I easily get 100% FALR using the default amount of chain tension.
From the research I did before purchasing I saw a larger number of folks with heavier tongue weights - usually above 750-800lb - that expressed some trouble getting enough load restoration on the front axle. The only complaint I have is that I did end up having to tack weld the brackets in order to keep them from slipping under tension.