As soon as there are nots, ors and ands and they start nesting and cascading all over the place Iím certain, nay, guaranteed, to get it wrong. I find it hard to write, the bugs hard to find and they are most often the sort of bugs that appear six months down the line. Did I mention my boolean algebra is weak?
If it is appropriate and I can fit the logic into a table I get on much better, it is all reduced to a lookup. If it is not appropriate then yours is the way to go. What is appropriate, of course, is a matter of taste. :-)