These are very nice trombones.... and beautifully finished and presented. They're free blowing and have a full, rich sound with good projection. We bought two for BRASS FOR AFRICA and I've blown them both.... both are fine. However, one of the slides seemed a little tight. So, I gave it a clean and washed it out with warm water & detergent then used my Slide-o-mix rod & sheath which improved it a lot. I'd recommend these for students, amateurs, and so on.... and they'd make a very acceptable 'back-up' instrument for a professional player. I don't want to pile on a lot of 'superlatives', but suffice to say these are very, very nice trombones... especially at the price.
Good 'ole Thomanns!!!