Irish Whistle C : A simple 'ok' sound. Second octave lacks

Bought this C whistle without too much expectations. Compared to a generation whistle, the sound is louder and more narrow with less 'overtones'. In the first octave, the notes are easier to play and it's harder to overblow the low C and D. The sound is ok there and relatively loud. It's more like between a tin whistle and a plastic recorder.

In the second octave, the sound lacks the singing in it. It's also not easy for all the notes to sound clear in the high octave. Sound production is a lot but it lacks the rich tones.

Pro

+Low price

+Tunable!

+Loud in first octave

+Easy to play in first octave

Negative

-Cheap feeling (lightness, plastic)

-Second register sounds bad

-Second register hard to play in