The alloy art is the simplest install to me of all of these. Had a buddy with the true track, he rides hard and never had an issue. I run true track on my Dyna and it poses no issues either, but on that motorcycle it is different as there is a front and rear, and it is far more noticeable.
Most people whom ride baggers don't tend to push their motorcycles, but those that do and upgrade suspension and other performance aspects of the motorcycles will definitely notice the difference with this type of mod. I'm not sure if it has been gone into above. The link will stiffen the link between the engine and swingarm as when the engine gets revving in the higher RPM ranges it has a tendency to move the swing arm side to side which in turn causes a wobble of the rear end of the motorcycle.
The 09+ bagger frames are far better than the 08 and earlier, however it is still one of the downfalls of Harley's design with separate transmissions and the swing arm mounted to the transmission which is attached to the rear of the motor. As the motor revs higher it tends to move side to side in the frame which in turn moves the trans side to side which the swing arm is connected to and in turn moves side to side. The goal of these rear stabilizers is to keep the lateral movement form being as pronounced at high engine rev.
Like I said I have true track on my Dyna (Dyna wobbles are as pronounced as high speed wobbles or 2008 and earlier baggers) and it makes a huge difference. I ran the Alloy art until i put on Bassani exhaust which was in teh way of the Alloy art link. The Alloy art link was noticeable to me as soon as I gave the bike some gas on the freeway. A more planted and solid feeling from the rear end (not that it didn't feel planted prior to that) (bike was a 2013 so the newer frame) that was far more stable and comfortable to ride. The reasonable cost and simple install of the Alloy art was what sold me on it. It took me 20 minutes to install in my (back then carport at my apartment).
I prefer the simplicity of the Alloy Art version. I'm not a fan of Progressive branded products. I also like True Track for the dyna as I have had them on both of the Dyna's I have owned, although there are a few other brands people claim are better.
I think the main thing to consider with these type of mods is how you ride. If you only cruise and don't ride fast canyons fast, you probably won't benefit as much as you would if you prefer to push your bike to and past it's limits. That is where these mods are the most noticeable. Not to say they are not noticeable otherwise, however the faster you ride and the more you take high speed sweepers, tight canyons, etc the more they shine.
My 2019 does not have any of this as of yet as I am yet to decide on a new exhaust system and such for it and I will wait until after I choose that to see what can be done for stabilization. Another point...if you have an older bike with factory Harley air shocks, I think you will notice less of it as the shocks are so subpar taht the ride is so bad that the air shocks may soak up the feeback, but this is just a guess.
Upgrade shocks first.
