Volume: Like the Alba soprano D, the second octave is quite a bit louder than the first. Unlike the D, it doesn't sound harsh or brash, so it doesn't come across as jarring as it could. The first octave is close to the same volume as my Clarke Sweetones. The second octave is much louder.
Responsiveness: Plenty responsive. I used this whistle to learn a couple of new reels, like Mason's Apron, and didn't struggle with the responsiveness at all. This kind of issue really shows it's head for me when learning a new tune, so I think it's safe to say that this whistle is good to go in that regard.
Tuning: Since this is a tunable whistle, I didn't have to work so hard at keeping as warm as I did the Alba soprano D. I just set it a little sharper and was able to go with much less care in that regard. There aren't any real hoops to jump through on the tuning on this whistle except on B (C# equivalent on a D whistle). That note requires quite a bit of push to put it in tune, much like on the Alba Soprano D. But all other notes have marked improvement in the breath required for tuning being in line with each note's neighbors.
B-flat (a C whistle's equivalent to C-natural): Easily played in tune with the standard OXXOOO. OXOOOO is about 25 cents sharp, and OXXOXX is about 55 cents flat.
Hole size and placement: The holes on this whistle are nicely finished, and centered along the barrel. They look a lot cleaner than on the Alba D I recently reviewed.
Air volume requirements: A little above average. I rate this similarly to the old-style Clarke C I pitted it against.
Air pressure requirements: While the second octave does take a bit more push than the first octave, it's not anything like the Alba Soprano D. The breath pressure requirements are much closer between the octaves, which is nice. But it does mean you can't really lean into it and wail like on the D Stacey makes.
Clogging: I haven't really experienced any clogging to speak of with this instrument, which is rare in an aluminum whistle. I don't think it would need the Duponol treatment at all. I can't say if this is a lucky happenstance with this whistle, as the other Albas I have reviewed have been fairly typical.
Wind Resistance: Fairly wind resistant. I played it outside a number of times without running into any issues at all.