This is much like the Snarling Dog, except it does not solely use moveable chord shapes. The Snarling Dog aslo offers scales, but it is all based upon the CAGE system.
If it were made out of metal with sturdier keys, I would like it better - and anyone who has ever fumbled for a chord should have one.
The GCF1 has voicings for Major, minor, MinorMajor, suspended, diminished, augmented, and add9 chords. It also supports 7th, 7th flat 5, 7th sharp 5, 7th flat 9, 7th sharp 9, 9th, 6th, 6/9, 11, 13, and sharp 5 chords as well.
It also supports genuine inversions and shapes, not just the moveable chord forms as the Snarling Dog chord finder.
It's not generally used live, but during practice. It's made out of plastic, it is not as sturdy as the Snarling Dog, but I like it a lot.