I have to say, the construction of the flute is first class: there are no signs of carelessness; the holes are all cut perfectly, unlike another flute from the USA which I got, which had some kind of varnish marking on the fingering holes.
I was probably quite fortunate - in that Eric (infrequently? sometimes?) auctions off his flutes below the list price. Is this flute worth it, at $200? $498?
What’s it like to play?
The feel of this McCarty flute - is fantastic. Remember - as a newcomer to ITM, I have exceptionally low standards compared to players of Wilkes, McGee flutes etc. The hole sizes are indeed different between the notes: I suppose this will set up perturbations, and as a result, some of the notes will sound different in character or volume from the next note up or down.
The overall sound signature of the McCarty flute is very sweet and resonant - it is a deep throated, slightly husky voiced instrument. It has a strong fundamental; the ‘E’ note being attenuated, as would be expected from the smaller D hole. The second octave really sings - it has a penetrating voice, which is not as evident in the base octave.
Articulation is something I’m struggling with, with the Irish flute. I find that I almost have to spit to make tonguing evident. Maybe I’ve spent too long in the sloppy legato wilderness. Did I mention that my rhythm is pretty crud too? Despite my limitations - I can hear the flute trying to get out. It does not require a lot of puff and it is moderate in volume - not the loudest flute I own, nor the quietest. Thankfully, it is not one of those hyperbreathy flutes either.
I played it against my chromatic tuner (Korg) - and it is exceedingly accurate across the octaves (my embouchure needs some work on this Irish blowing style hmmm).
I made a sound sample on my mini-disc player with a US$8 microphone of the first song of my new book by Tomas O Canainn which I am really enjoying i.e. I actually got to the end of the first slow air entitled ‘Siubhan Ni Dhibhir’ and still able to say "I’m still here’, in the vein of Tony Blair.
Unfortunately it’s on a .wav file about 10MB, so if anyone wants to hear what this McCarty flute sounds like, it’s available if you PM me your email, until I get my ultraexpensive megafantastical digital Zoom recorder, once it’s available again on the market 
Summarising this flute - I’d have to say, that I can see and hear all the skepticism that others have offered: yes there are countless rip offs on the internet at a fraction of the price I paid for mine, let alone the listed price, but this is the same with most things, is it not?
There is nothing about this flute which would make me think it is a cheap foreign import. I’m really enjoying playing with it. Is that because of the ITM, or the Irish flute? I think it’s both really. I’m really liking the depth and tone colour of this flute. It’s definitely worth the price I paid for mine - and I would choose American Black Walnut again - perhaps an unusual choice, however the benefits are very audible. I have a number of rosewood flutes, and the character of the American black walnut is extremely pleasing. Eric doesn’t mention (as most flutemakers do not), how long the black walnut wood has been left to air dry naturally. The deep timbres and tones of this flute suggest to me that it is not a hastily baked oven dried specimen: I’ve heard these kinds of flutes before in bansuris; dizs; xiaos and I can tell what an oven crisp sound is!
So talking of ovens - flame away guys. But if anyone can help me figure out how to convert a .wav file to something uploadable, please feel welcome - and you can then hear what this flute sounds like, played by an ITM beginner. For my first foray into the ITM, I’d rather spend something like this on a McCarty flute, than end up with the other choices which I did…maybe I got lucky. I probably would not spend $498 on a flute I didn’t know, but this is one great flute for a newcomer.
I do have non-matching American and European table leg flutes which are way inferior to the McCarty flute. This one …I’m really pleased with it.