As someone earning a living, or trying to, via photography it is essential that I be able to deal with metadata quickly and easily, particularly keywording. That said I find this aspect of Ligthroom 3 anything but quick and easy to use. Simply put the whole interface is badly in need of a total overhaul! Case in point, what is the use of coming up with keyword sets if those sets aren't assignable with a single mouse click? And while a 9 keyword limit might work Ok for a hobby photographer it is simply worthless for a pro who often assigns as many as 25 keywords to a single image. In addition, I find the entire interface of the library module to be so "cramped" as to make it nearly impossible to use easily and quickly. Using Library in LR 3 one is put in mind of the Bad Old Days of DOS. Far too much need to memorize details rather than having a simple, uncluttered and spacious landscape within which to work. While I love the Develope module of LR 3 if the Library module is not soon improved I am going to have to move to a new software platform.