I actually just began using the CLZ app for iPad after trying out 4 different apps. While not the easiest to use at first, it did become much easier as I used it. I have just begun building a CD library so I do not have much to enter, and I have committed myself to catalogue what I buy immediately, so there won't be a backlog (and maybe keep my purchases under control... wishful thinking). I can see how it may be daunting for people with large collections spread out across many years, but this app seems to be the best right now. At least for me and my small, budding collection.