Startone SFL-55 Flute

I bought this for my wife who had a Chezch flute before since her childhood, and that flute is very very used, the pads are almost fully worn, have holes in them, etc. I hoped this one will be a great substitute, but it disappointed. The low voices just do not come out of it. We took it to service 3-4 times, but it did not really get better. The sound of it is much less powerful/cool as the old Czech flute, the quality of the parts is also lacking. Honestly the best part of this flute is the sturdy and very nice case.