I currently use the Fishman Triple Play (placed on a Telecaster) and it is quite nice although like most MIDI guitar controllers it is really helpful if you have really good technique. My technique certainly isn’t flawless so I always need to spend additional time running through a deglitch process.
I also have a Godin SynthAccess guitar (the nylon string model) that I use to drive my Axon AX100 MK II. The Axon uses a MIDI cable (guitar to unit). I believe this helps, slightly, with the accuracy of the tracking. Both the Axon and the Fishman were developed by the same person whose name escapes me at the moment. The Axon is no longer sold.
I’m a relative newb to Cubase and have not tried the Staff editing tool so I can’t help you there…it looks pretty nice though and plan on giving it a spin in the not too far distant future.
Regards,