I borrowed a GR20 and guitar set up with GK2A for a couple of months. Overall I found it good but did have to adjust the string sensitivities and my technique.
There are different sensitivity settings for picking or strumming etc and you may need to adjust settings to get the best out of the different instrument sounds. The tracking was good but it depends on the attack characteristics of the sound ~ e.g. a slow string pad is quite different to a saxophone or piano in its dynamics and therefore the way you play it.
I found I had to be most precise in my technique playing piano chords or would accidentally cause unwanted notes to trigger from string squeaks and harmonic overtones. You get used to it after a few hours of playing. And you have to phrase/voice in the manner of the instrument you are using to get the best realism e.g. some guitar chord voicings dont quite sound like a piano because a pianist would use a different voice than guitar etc.
I used it for a recording project but have not used one live.
It's a great creative tool.
If you already have some MIDI sound modules or keyboards that you want to use then you could get
a GI20 interface and a GK3 but the GR20 is probably going to be cheaper and of course includes its own sounds.
The GK3 is definitely abetter pickup than
the GK2A and I believe it comes with
the GR20.
I couldnt afford to buy one at the time and at the moment all the material I'm working on is guitar based otherwise I'd try to scrape up a few dollars and get one for the home studio.
Go to your local dealer ask them to let you play one
