I suppose the debate will be endless on the merits of an Independent Rear Suspension vs. a Solid Axle. I sold my 14 Limited because of my age and the need for three wheels. Like most of us, I researched to the point of even greater indecision. I finally decided that I wanted the Harley warranty and I wanted the 14 Triglide....it was important to me but I understand how that might not be important to everyone.
After the first 1,000 miles I can say that there have been zero issues mechanically, no puking coolant or any other issues. I am getting 30-32 MPG riding solo. The infotainment system is working as advertised with no issues. My mechanic told me the seat on the 14 Triglide is different than the seat on the 14 Ultra. The Triglide seat seems slightly softer and fits me well. (6' -220) I am reaching forward just a little more than on my Limited to reach the bars so I have ordered the 2" pullbacks from my dealer to be installed in the next week or two. I left the stock exhaust. I added the Amp (what a difference!), CB and XM - all works great.
I will say that if you are considering the new Trigllide please don't expect it to ride as smoothly as an IRS....I had an 09 Wing with the Motor Trike IRS and it was silky smooth but the Wing and I just didn't fit well. I could have gone with another Motor Trike kit on my 14 Limited but I just wasn't willing to take a chance on the warranty.
I live in Texas in a Rural area and our roads are usually the last to get maintenance....I will say that I am not at all comfortable riding aggressively on these roads as the Trike is not real forgiving on rough surfaces. Most of the time, however, the ride is very comfortable and enjoyable and, as is often the case, when going from two to three wheels, the more I ride the less I am concerned about the solid axel. I run 36 in the front tire, 30 in the shocks, and 26 in the rear tires. I also added the DK Custom comfort lift kit that my dealer installed.
Think of it as the difference in the ride of a luxury car or a stiff suspension sports car. They both have their merits. Bottom line, If I had an older Harley I wouldn't hesitate to go with IRS.....I really am however enjoying the Triglide, solid axle and all, with the added peace of mind of the Harley warranty. Just my 2 cents. Ride safely