I have a Besson Prestige cornet and although it makes a good sound, it is really hard to play. Intonation is really poor, my lips get sore very quickly and I struggle with high notes. I have played other cornets and they are much easier to play (both easier on the lips and don't need much triggering). One cornet pretty much added half an octave to my range, and that was with exactly the same mouthpiece. I had no idea that the instrument could make that much difference, I thought it was mostly down to the player and mouthpiece. Is it me, is it the instrument, my mouthpiece or is it a combination of everything working together? I'm in the process of trying different mouthpieces, but I have even tried the one that came with the instrument, so it should be compatible with the instrument. I'm starting to think it's not worth the effort.