It's not bad or good, it's just a pain in the ass when you lower one. I haven't heard any complaints about 2 piece driveshafts so I assume they work fine.
Deric from ground force said the vibration people are having with the other kits is because they have no carrier bearing relocator and no transmission spacer. He said the gf kits come with that. I made sure to ask all the Nessasary ?
Im doing a 2/5 drop and he said it'll perfectly level my truck. clearance issues won't be a problem cause it's not really that low and no rubbing with the 305/40/r22s. The ground force kit don't need cam bolts either cause it's all factory specs.
I always thought anything over 2" on the rear on the 04-08's required a flip kit, and lift shackles. Yes, I said lift shackles.