Should I install floating solid bamboo flooring?
In general, floating surfaces can be louder when you walk on them.  This is more noticable on subflooring that is rough or uneven.  The sound can be clicking/slapping/hollow sounds.  Depending on the underlayment, the floor can feel springier than glued or nailed flooring.

I recommend having an installer do glue-down on concrete subfloor, or nail-down on a raised foundation.  The solid feel and less sound when walking on it is worth the extra installation dollars, in my opinion.