I picked up some 559s (Relaxed Straight Leg) and some 505s (Classic Straight Leg) for my husband.  The classics look good, but the seat of the 559s droops down, looking very odd.  I suspect for those with more well-endowed behinds the 559s might look good.  But if you have less padding on the seat, skip this particular style of Levis.  Go with the 505s for a cleaner look (good for semi-businesslike offices where one can wear jeans) or the 550s (relaxed fit) for very casual comfort.