I've spent the last week researching this same topic and making phone calls to the various providers gathering facts and opinions. My problem is a bit different, but my end goals are essentially the same as the OP - improved reliability and reduced maintenance. I have 22,000 miles on my JKUR and I'm running 35" KO2s under a Rock Krawler 2.5" lift with the RK lower control arms in front and the RK track bar. One thing I've realized after driving it for 10,000 miles and about 6 months
is that any parts that use jam nuts (like RK does) REALLY SUCK for a daily driver/overlanding rig. The problem is that most of them cannot be tightened/torqued without completely removing from the vehicle using a variety of specialty tools, two people, and a VERY stout bench vice. This means it is essentially impossible to perform field repairs. After my last Baja trip I developed steering problems (rattle, bump steer, mild wandering). It took me a while, but I determined the cause was a loose jam nut on the track bar. Apparently even though it was installed with red Loctite and torqued to 300 ft lbs, it came loose after extended driving over rough roads. Apparently this is not uncommon.
So, the TL;DR is don't use anything with jam nuts that requires removal from vehicle for adjustment.
This eliminates many of the options for adjustable track bars and leaves the Yeti XD, Synergy, Teraflex, Rubicon Express, Rugged Ridge and Rough Country according to my research.
For this reason (and others I can specify) I am planning to replace my RK track bar with a unit from Synergy (I like the design better than the Yet XD) along with Synergy's
steering sector shaft/track bar brace,
drag link, and
tie rod. My reason: the #1 thing I'm solving for is reliability and ease of maintenance, including field maintenance on extended trips. I think the MC, JKS, and RK stuff would be great for someone that trailers their Jeep to MOAB for a weekend, but not for a daily driver that also does duty for extended overland trips like mine.
The Synergy units use an end clamp that can be adjusted on vehicle using normal tools and normal human strength but are far more streamlined than the Yeti XD double clamp arrangement. The Synergy tie rods and drag link use the same ends (each side is different) and are inexpensive compared to Yeti ($45 vs $170 each). You can carry two spares and be able to fix any problem with either end of the tie rod or drag link.
The sector shaft/track bar brace addresses a known weakness of the JK frame (shallow welds) where the steering box and track bar are mounted, and AFAIK is not available (and not compatible) with the Yeti/steersmarts components. I have also read (and been told) that the Synergy tie rod, because it is made of chromoly tubing instead of solid bar stock (like the Yeti/SS) tends to "spring back" after deflection from an obstacle as opposed to bending.
