I bought this instrument to play some gigs and despite having +20 years of experience I am not a professional player but the end finishing quality of this instrument could be better honestly. There was a card in the box saying the instrument was been thoroughly checked before dispatching but after playing 2 pieces, the cap of the valve button got loose. It seems that it was not glued properly (I have a picture but I cannot add it in here).
Despite everything, I glue the cap of the valve button and now it is ok.
For the price in question, it is an ok instrument and does the job for a student of a beginner musician. However, it is not a great instrument for a middle level or professional player. The sound output could be better, the sliders sometimes do not work perfectly and the valves could be more easy to operate.
Also, both the top and bottom valve caps are not easy to operate. Someone with no experience could damage those really easily.
In summary, for the price in question, it is a good instrument for a student or a beginner player. Not recommended if you are a midle-level or professional musician.