I haven't yet but have been researching'em for the past two months or so. I think I'm going to go with Blue Ox's WD w/4 point sway control. The nice thing about their set up is the lubrication is 'self contained' and if you go to a heavier set up you just have to buy new spring bars.
'08 427R TrakPak #68
- JLT CAI, Tuned by Performance Autosport, Maximum Motorsport 4pt Rollbar w/5pt Harness
'06 Ford F-250 FX4 PSD
- Studded, GearHead Tuned, MBRP Turboback 4" Exhaust, Sinister Coolant Filter, Isspro Gauges, Edge Insight w/Pyro