I love the damn thing! It's really easy to organize various projects or categories into folders and files so I use it as my main photo library, where I keep all my stuff. Its simple to get to grips with but as deep as LR, all the major editing tools are there.
I like the way edits are non destructive so you can erase any edits you make and get back to the original RAW. There's also a template feature where you can make a set of edits, then select any amount of images and copy those edits onto them all, Pretty useful if you want a set of photos to have the same look/style.
I don't use any plug-ins, if I need heavy editing [layers, liquify, cloning etc] I use photoshop and then store the results in Aperture.
The way apple software works just 'sits better' with me, Microsoft Word held out pretty long but I eventually switched to Pages [apple word processor]. The only thing I don't like is I tunes.... 'Why have my Soundgarden albums just disappeared??!! DAMN YOU'