Well, I also decided to take the plunge and I just ordered the hitch. I have a short (90 mile) trip coming up next weekend, so hopefully I get it in time to try it out on the trip.
I have a trailer that has the coupler mounted to the bottom of the frame. As I'm thinking of the forces involved, I don't think this should matter much since changes in the vertical distance between the coupler and where the chain attaches won't significantly change the amount of horizontal force applied to the hitch.
Right now my tow vehicle is a 2005 Nissan Armada. The trailer is a KZ Spree 318BHS. I use an Equal-i-zer hitch and it works very well. I've towed it in all sorts of weather conditions without trouble. The only time I did have some problems with the wind pushing the trailer a bit, we pulled over for gas and I had a bit of trouble standing when I got out due to the wind. I didn't realize the wind was blowing quite that hard! So, we waited about 30 mins for the wind to die down and then continued on our way...very impressed with the hitch.
So, why am I interested in switching to this hitch? Quicker to hook up, no grease (which has ruined quite a few of my and my kids' shirts and pants), less noise, possibly less vertical bounce and, above all, perhaps less frequent tightening. I have to constantly re-tighten parts of the equalizer, especially the arm brackets which move about on the trailer frame quite a bit if I don't really stay on top of them (and still move a bit even if I do keep them tight!). So, hopefully the Anderson is much better in this regard.
I'll let you know how it works out.