I helped a friend install a set of Full Race brake lines.
We struggled a bit installing the rears since the fittings on the lines didn't exactly match the size of fittings on the OEM lines. There is a bracket mounted on the frame that needed to be loosened and moved a little to get it to work.
The fronts seemed to go in ok but the fit of the lines didn't seem to follow the path of the OEM lines exactly. There was a tight bend in the line near the brake caliper which felt slightly off.
I didn't notice any dramatic difference in pedal feel after the install which is what Full Race will have you believe will happen.
This is coming off sounding like a negative review, and I don't mean that to be the case though. The good part is the Full Race brake lines appear ultra durable and look like they will last forever.
The SDHQ kit looks pretty good but _very_ similar to the Full Race ones. So much so, I was wondering if SDHQ outsourced the job of creating their lines to Full Race. The only difference I could see is that the Full Race brake line retaining clips were zinc coated.
The RPG brake line kit looks as if it has the same fittings as the OEM lines. This may mean the fitment will be better than the Full Race and SDHQ lines. Their lines however lack the abrasion resistant PVC Kevlar on the outside of the line which I think is a pretty sweet addition. Also it seems like their kit is only for the fronts. I'm not sure if they offer anything for the rears.