Can those who have this collection in their library comment on it's usefulness and any other opinions you may wish to express about it?
Old Testament Cultural Practices http://www.logos.com/product/5910/old-testament-cultural-practices-collection
I bought this collection in pre-pub, as my aim is to built up the entire set of JSOT Supplements in my library. Mostly just for being able to research any OT topic I want and be able to find some excellent scholarly essays on it. (I'm collecting JSNTS, too, though Logos has produced way fewer of those than the corresponding OT ones so far.) I can't say I've done so yet, but I'm one of those people who buys stuff "just in case." They are certainly of very high quality, as is anything published by Sheffield Academic Press / T&T Clark.