At least one person wants to know more, and I have had large amounts of help on this forum, so I will say a bit more about this whistle, and hope it is of use.
Disclaimer:
I do not have much experience of whistles - I have only ever played three low-D whistles including this one from Tony Dixon. Maybe if you all sent me your favourite whistles I could do a more balanced comparison. My other whistles are an Overton medium blower and a cheiftain (which I hardly ever play now - it will soon be looking for a new home).
I am still a beginner (maybe I have got that far…) so what I say must be taken with a pinch of salt, and I am not sure what terms like ‘breathy’, ‘chiff’ and so forth really mean. So my review may be completely useless. Whatever I say, please do not let my review put you off buying one of these whistles.
To business:
I think this is an excellent whistle. Comparing it with the Overton seems unfair as they are different animals entirely, but that seems the only way I can make sensible comments that others may understand.
It is quiet and easy to blow, but the air requirements do not increase as dramatically with pitch as my Cheiftain. The high notes are easy to play sweetly and I am flirting with the third D, and even sneaking up on the third E - though the dogs are still uneasy at the results. Everywhere the note sounds lighter, cleaner, and, though I really want to resist saying it, more flute like.
The octaves jumps seam easy, clean and controlable, but occur maybe a little early to get good volume out of the lowest notes. The volume is well balanced across the range, but significantly lower than the Overton, and I have not been able to exert much control over the volume. This is probably because the back pressure is lower.
As an experiment I got my better half to try the whistle. She is no musician, and mostly refuses to try, but she got some good clear notes at the top of the first octave and at the bottom of the second octave. Had I got those when starting I would have been well pleased.
The finger holes are relatively small - which meant that I missed them a lot when starting, and also that bending notes was a bit tricky. Time, practice and patience seem to be sorting these problems out.
My better half prefers me playing the Dixon - she says I hardly ever hit a bad note compared to the Overton - I wonder though how much the lower volume contributes?
I still prefer the tone and the back pressure of the Overton though it is harder to play and in my hands still generates more squeaks and squarks. I find however that I pick the Dixon up more often - it takes less warming up, and is probably a better match for my skill level.
The Dixon is very practical. I was given a whistle head, a flute head, and the two sections of the body, all in a really neat cordura case with velcro down flap. The most portable low D I have seen, and it is the most likely to travel with me (if I am only allowed one whistle).
I like the Dixon whistle a lot, it has become my go-to-first whistle. I may outgrow it as I get more proficient on the Overton, but only time will tell. I still occasionally try the flute head, but as yet have not got anything remotely musical. I think I saw comment on the sister forum that the Dixon three piece flute was a good choice for a beginner - so this pack would make an excellent starter set for someone interested in both.
I hope someone finds the ramblings useful.