Terra has been one of the front runners for long arm as well as short arm kits. They introduced these couple years ago, looking to eliminate the track bars front and rear.
In my review, its not any harder to install than any other LA kit. But to properly use the concept of the LA in a shortwheelbase vehicle, you do have to lengthen the wheelbase, get large tires (somewhere near 37's minimum) to get the maximum from the droop and lean of the Jeep, and learn how to drive differently due to the droop and lean. Its the next step up from the high lift short arm kits and large tires. But due to running 37, 39s, 42s, the stock axles won't due. So a lot of these top LA kits work with axle swaps.
In comparison, not to go higher than 4-5" for the short arm kits (depending on the arms, springs, track bars, etc), running no taller than 35-36". Though you can run larger than suggested tire size, there will be some complications.