With a mild sized tire and wheel combination, you wouldn't wear the parts as fast.
The 6" lift keeps the front suspension at its original geometry.
The bracketry just moves the control arms down 6" or so lower on the frame.
I've seen a few slightly different steering setups but it is usually a decent design sometimes with a steering assist link, according to some installers that I've spoken with.
I feel that if you don't go crazy with your tire and wheel choice you will be ok.
Like say a 315/75-16 on some 16x8" wheels.
Anyway Bowtie Freak will probably drop in soon.
He has two vehicles with the 6" lift and will be able to tell you more than I can.
What's your plan for wheels and tires?