I got the A, G, F set… and I agree, the A really sings. It’s great for tunes in D that go below D a little way… what the Low Whistle Book calls a “G type” tune. That, actually, is why I bought the things. I just figured I’d get the G and F while I was at it, knowing the F would be useful for some things I’d like to move from recorder to whistle on.
The G, though, just has me stymied as hole 6 is even bigger than on the F and a long long way away from hole 5. I suppose practice makes perfect, anyway.
Was working on a church tune in G just now that is back and forth between the lower end of the second octave and the top of the first and getting those last two holes sealed reliably and quickly is … well, I’m not there yet.