Considering that my main instrument is an Eb tuba, this CC tuba is very agile and facilitating to play. I practise daily with the Grand Fifty and it considerably improves my Eb play. I recognize remarks by others about tuning the slides and water gathering in tubes, but that should hinder no one to acquire this beautiful instrument. The only long term topic is durability, of which I obviousely cannot make a statement after three weeks of play. All in all, BRAVO Thomann for developing this beauty!!