I'm a seasoned bookmark user, having used and tested over 15 (yes, 15) bookmark managers in the last year alone. I was also a Raindrop.io user for the last 3 years while seeking out an alternative. And this bookmark manager is it!

Pros:
Lightening fast to find my bookmarks
Web app, desktop app, Android app all sync seamlessly
No annoying folders to sort through
No fancy divisions for PDF, video, article, doc, etc.
No way to share links with the public, so it's just MY bookmarks.
Easy to drill down using a simple, but POWERFUL, tag system to find that one idea you're looking for!

Cons:
Current updates do NOT include a way to sort all bookmarks (other than the tags; i.e. sort alphabetically, sort by last saved, sort by most popular). For me, not a biggie since the tags are so fast to locate my saves.
No folders. That's a big YEEEESSSS in my books since I'm sick of sorting by folders.
Only one view for bookmarks currently and it's not so minimalist--it's a larger rectangle with the website and tags, but it's quite bulky and takes up lots of space. This feature does appear to be in the works, though. I personally prefer a gallery view and a stripped-down list view of just the website icon and name.

I hope the developer doesn't start adding too many frills to the app. Or, they at least allow users to toggle off and hide features they don't want to ever see or use.

Overall, totally what I was looking for: a powerfully minimalistic bookmark manager.