The foot rest is too high, Im 6' tall and when I have the chair at a comfortable height the foot rest is still way too high.

The height of backrest is not adjustable

and once I figured out the best height for me it will stay where it is

Everyone will find a seat height that works for their legs and the welded-in-place footrest, but either you adjust the seat for the footrest or the footrest will likely be at the wrong height for you

It is a bit heavy, but the seat is perfect height, adjustable and comfortable.

Not comfortable, and the footrest is at a useless height.