Based on a quick look, the biggest features it has that browser bookmark managers generally don’t have is the ability to search within saved webpages and documents without opening them. Plus, you can share bookmark collections with other people. Sounds a bit like a modern rendition of del.icio.us
Used it for a while. I quite liked it, but ultimately I switched to an LTSC build because there was an issue with configuring my printer’s driver that I couldn’t resolve. The tweaks likely got rid of a dependency that the driver used