I have the regular teleflex cable set-up that has been on there since 2002. Had it first with the 115 four stroke and now the 250 Pro XS. It has handled both just fine, but does have a slight pull to the right. I have never tried the NFB so don't know what kind of difference it makes.
After doing a search for reviews on them, I found several negative reviews. Mostly had to do with the way the system works. When you stop turning the wheel the clutch engages holding it in place, to help eliminate engine torque steer. Most complaints were that it took significant force initially to start turning the wheel and overcome the clutch.
Like I said, I have never tried one, this is only going on what I have read. It seems to me it would be fine with a prop, but with the jet there have been many times where I have basically free spun the wheel from one side to the other in tight maneuvers. I don't know if you can do that with the NFB.
Hopefully someone that has one or has used one will chime in later.