Hi DK5.., welcome..!
I think it was someone on this site that mentioned the one disadvantage to discs.
However, I can't remember what it was. :huh: Overall, discs are fine.
Have not heard any complaints about any of the kits..., except;
Some do not have "emergency brake" capability.
Getting the right pressure (front more than back) has been mentioned.
Porportioning valves come with most kits.
Side note: I have not switched to disc as my rig stops as good or better than my F-150
and should when the drum set-up is kept up to spec.
Have fun out there..!!
B