Volume: On the quiet side. Easily far quieter than any of the cheapies I pitted it against. Totally blown away by the Copland and SZBE in terms of volume. Not for a really loud session. Well, unless you were a bit shy and didn't really want to be heard anyway.
Responsiveness: Quick and responsive. Ornaments and such just trip off the whistle. It's a fun little whistle to play and feels quite nimble.
Tuning: The tuning is pretty good on this whistle. Noah has put an in-tune mark to help quickly align the headpiece, but I found that the whistle was pretty sharp at this mark when warmed up. The F# needs a little push to bring it into line compared with its neighbors, especially so in the second octave. Otherwise, no real surprises here.
C-natural: OXXOOO cross fingered C-natural is sharp by about 40 cents. OXXOXX is just about perfect.
Hole size and placement: The holes are fairly evenly spaced, and nicely centered on the whistle--though as noted above, the bottom-most hole is a smidge off-center. I didn't really notice that until I scrutinized the instrument, though.
Air volume requirements: Extremely low. This whistle takes hardly any air at all. You just play and play without much effort on this whistle.
Air pressure requirements: Though the whistle has a slight amount of backpressure, this is also extremely low. It just doesn't take much push at all to play in either octave, though hitting the highest notes (second octave A and B) does take more work than the rest of the whistle.
Clogging: All of the Laughing Whistles I've played have been extremely fast cloggers. When they clog up, they quickly fade away until they stop playing. You definitely will want some kind of relief here. Duponol may help, but I can't say for sure, since this was a loaner whistle.
Wind Resistance: This whistle isn't really that wind resistant. I was able to play it in the lightest breezes, but really, works best indoors.