tubular lower control arms

They're about 8 lbs lighter than the stockers, and allow for more suspension travel because you have more clearance to the bumpstop than on a stock lower.

As far as cost, if you can do the blasting and reinforcing, the tubular ones are about 4x as expensive. I just clean mine up, weld in the reinforcing plates, and swap them to new grease-able pivot pins and poly bushings. Powdercoating is totally overkill, they were bare from the factory. I just spray bomb mine.

Finally, about experience. I ran a set of these on my Challenger for a few years. They were built by CAP, which was bought out by QA1. CAP was known for crappy quality control and welding, and lo and behold, I broke a weld on one of mine. Well, fractured one. No catastrophic failure that led to a crash, I noticed my car was sitting low on the right front and found the cracked weld, which allowed the tubular LCA to bend enough to drop my ride height.

I'm sure that QA1 has done their homework, I think these were off the market for a couple years after QA1 bought CAP. Rumor was that they were re-evaluating designs etc. I'd have to compare a new set to my old set to see any changes, the pictures look about the same. But even if all they did was make sure all the welds were good they'd hold up fine.