Just wanted to chime in. I have had the Andersen for about a year now and taken a handful of trips. I find many pros with the design and execution. The towing experience was 95% of the way there for me. Unfortunately I cant get the Andersen to put enough weight back up front on my setup. My truck does not like being light up front and that was a deal breaker.
I can also say this - the people at Andersen have been very good with talking with me. It took a while to get things going back and forth but I ended up speaking with their VP for quite a while. He is a really nice guy and was very helpful and open to talking with me. He admitted to the hitches shortcoming with weight distribution. They knew they would hit a limit but said that after speaking with many hitch owners and lots of testing they decided that they were happy with the setup. When they designed it they knew they would need to compromise somewhere, almost all designs have a compromise. They were aiming for simple, lighweight, better ride with reduced bounce and keeping it clean (grease free). On all of those points they nailed it.
As for the coupler, I honestly dont know what model coupler I have on my FR. It doesnt show any abnormal wear that I can tell but it is also a brand new TT with only a handful of trips. It was a concern of mine after being brought up for long term use.
For me the Andersen will not work and I am in the process of shopping for a new WD system. For people who dont need a lot of weight moved forward or are not concerned with that I think its a very viable option to look into. I truly do wish they could have made it work on my setup, the ride when towing was near perfect.