I've been using this for a while also and I love it. It makes it easy to do things like try out new Home Replacements. Before I would have to recreate each folder and drag every app back into them in the new Home app but now I just add the different Categories and I'm done.
I also like that if you want to move something from one category to the other, you open up app organizer and just check off the ones you want. No need to remove it from the folder, go into the new folder, drag it from the app list, etc.
It also keeps "unlabeled" apps in a specific section so that its easy to go there after a market marathon and label each new app.
So yeah, I HIGHLY recommend this app. I turned my Messaging, Gmail, Email, GTalk, etc apps into one Icon with it on my Home screen
