I just love Kerry whistles. My favourite Busker is Bb because it's a bit different than other Busker whistles I own (D, A and G). Bb whistle have smaller holes then other in The Busker line so it sounds lighter and it's a bit quieter. Smaller holes don't affect to expression posibilities when played. On the body there is also some other engravings (website and serial number) so I presume that I got newer version of whistle. The sound is a bit raspy in high octave, but it is not annoying or bad raspy sound. It have character and I like it. I'm recording with my Kerry whistles, and they are very good with intonation. You just have to warm it a little bit. It's tunable, that was my priority with every whistle I chose. The craftsmanship is superb. It's durable and beautiful instrument that works and it's very playable and expressive. I can play any note on higher octave with ease.