Yep. For close-ups and/or indoor scenes, I use 1bu=1inch. Other times, I'll use 1bu = 1 ft. or 1bu = 1 meter. When I import a figure from Poser, it almost always comes in at 40.96bu tall. If I want it to be a scale 6ft (72 in) I can just feed in the original height (using an onscreen calculator) as a number to divide the target height by, and get a multiplier that will make it the right size. That way I can keep all my charactes and props in proportion.