They had issues with the SS series of ballasts, which was an error they admitted because they spec'd a piece of hardware that would fit into a more compact ballast but did not do well in freezing temps.

The successing DSP ballasts (I have them in my fogs, TRS replaced my SS's hassle free and my FiL has in his headlights) were just fine, and these XB's are also great for the price.

And yes the canbus modules are also good, I use them inline with my fog ballasts and no issues.

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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards