Novak - GTB with Lipo cutoff. Works fine never had an issue with it. However, I do not feel the programming changes and I've owned over 4 GTBs before I switched mostly to LRP due to size since the GTB has a large footprint. I have crossed the +, - wires with the power off on the speedo and I didn't fry it. I would have to agree the Novak Customer Service is great and they are very helpful.
LRP - Programming changes are noticeable and is fairly easy to program once you do it a few times. I use the TC Spec the most. Do not cross the wires or you'll fry this speedo even with the power switch in the off position
. Customer service is ok, a little slow to respond to e-mails but the do get back to you.
Tekin - RS Pro, based on the reviews on here, I want to try it out.
KO/Orion - I also want to also try the KO Brushless speedo that also has a small size and similar-styled soldering posts like the Tekin. It also has a PC interface for more in-depth tuning.
Does anyone use the KO or Orion brushless ESC?