Outer Limits 4x4 Board

I have done a search on here but cant find any info. What i want to know is, has anybody fitted these and what are the pros and cons of using them. I am going to do a front Dif rebuild in the near future and was just wanting some feedback.

Unless you have destroyed you king pin bearings, I reckon it'd be a real annoyance having to regularly grease the bushing. I know it's fitted with a grease nipple but it's just another thing to have to maintain. If it's a comp truck or play truck, go for it.