After about 5 months, the metal started to tarnish badly and the F# key started to not come up then ever it was pressed

The metal seems to stain after while of using it (yes I do clean it after every use) more specifically near the area where the lips are placed on the head of the flute and where the flute balances on your right thumb.

I'd also like to mention that whatever "metal" this company uses tarnishes.

Second, the metal this flute is made from is terrible.

The instrument that arrived was exactly the one that was pictured on the listing: removable plugs for converting to an open-keyed instrument (and, thoughtfully, a jeweler's screwdriver for unmounting the keys to prevent damage to the instrument when the day to do that arrives); offset-g with split-e mechanism; and a b-foot with gizmo key (so playing the top c doesn't blow out a lung).That said:* When pressing only the c-roller key on the foot, the c-sharp key stands half a millimeter proud of its tone hole, which prevents middle c from speaking

L wouldn't recommend