100% Sucess Rate on both on my last 5 rezzes. I'm favouring the Gnomish Army Knife: Easy on the mats, replaces so many items. Spread the excess among the alts and friends. It's a little bit of love for Engineers.
The jumper cables have been utter fail for me since going beyond level 70, no matter what level the character I am trying to rez, I will be crafting myself a knife as soon as I get back to Engineering (I have been focusing on Leatherworking).
Maybe its just because I'm the paranoid type but why choose? On my engineer I carry all 3. If the regulars fail then I try the XL, if that fails then theres still the knife to play with :)
Well, I stand corrected :) haven't had to try jumping anyone since I got the knife so I was hoping since I remember being able to use the regulars and the XL separately at one point or another and just assumed. Just goes to reinforce what they say when you assume things lol