I installed a bamboo floor in a client's house two years ago. They
love it! It is harder than red oak due to a very high silica content.

As others have noted, it is a much more "renewable" resource--a new
crop can be cut every 5 years, and it grows from the roots (can't do
that with oak!).

The silica does mean it's harder on saw blades: the floor I laid was
only 200 s.f. but by the time I finished the nearly-new blade I started
with was beginning to burn the curf.

Oh, the stuff is just flat-out beautiful in the morning sun!

Dan