Though Rubicon Express had a period when they were shipping their control arms with bad bushings, I can't say they make a bad suspension lift. I ran their 4.5" long arm suspension for years without problem and other than the long arms hanging up on the rocks, it never gave me any problems.
That said, that Jeep got stolen and my replacement Jeep has a 4" Currie suspension using Currie's short control arms that use Johnnie Joints. You can't beat a Currie or one that is based on Currie's as Savvy Offroad's is. One thing for sure, my Currie arms don't get hung up in the rocks.