i have the rustys kit. ive been running it for two years now, no sag whatsoever. i did remove the bottom helper on the rear springs because i felt they were a little stiff. but other than that i thought i got a great kit for a great price. but i have heard a LOT of bad about rustys.
however, how many people really think to post when shipping goes GOOD. i mean yeah, you see alot of bad things, but thats because no one posts when it turns out fine, because its expected.
ive ordered several things and have always gotten great customer service and fast shipping. however ive heard of people whove gotten screwed numerous times.
i guess its a hit or miss...