It's 83" long x 22 1/2" deep

Is the sink wall mounted? How tall is the countertop? Are the top drawers functional? If so how with the under part of the sink?

The sink is not wall mounted. The top cabinets are kitchen height (34 1/2"). The top drawers are all functional. The top middle drawer is a U- shape inside for the plumbing to clear and the bottom 2 are slightly reduced in depth for the plumbing to run behind. :)