I am a paid Evernote subscriber and I like the fact that it stores just about anything digital. I don't like the organization aspect. I would much prefer a hierarchical file system and the folders and stacks feature doesn't satisfy my needs. For me, it's a case of using Evernote until something that better meets my needs comes along.
The killer features of Evernote are:
1. It's available on all desktop and mobile platforms, and even supports offline desktop and mobile functionality if you're a premium member, so you can take your information with you wherever you go.
2. You can also add new content wherever you are, provided you have at least a mobile device. When your device has connectivity, the new information will be synced to the Evernote cloud store.
3. The user interface is well done on the desktop, mobile, and web versions of Evernote, so it's not a struggle to get your content into Evernote or to access existing content when you need it.
I use Evernote daily and I use it as a bucket to dump things into for (possible) later processing. My life is so busy that I often don't ever get back to the stuff I post in Evernote, but I feel better knowing I could.
A better Evernote type system for me would allow me to enter/add any sort of digital content on the front end and then organize it into a hierarchical file system when I get a chance, because that's how I think about "things in the world" and is the system I use at home and work that allows me to manage my extreme amount and variety of content. A perfect tool would allow me to store all this content according to projects, sub-projects, tasks, etc. since that's the way I manage my life without going insane.