This is a GUI library designed with the goals to be light, fast, flexible, portable, and to include all features expected from an advanced GUI. It's primarily designed for games with high demands on look and feel.
- Drag n' Drop
The other "reviewer" here clearly has some kind of agenda; they have posted the same review word for word to multiple projects. In addition, instead of actually reviewing the projects themselves, they instead offer some thoughts on the merits of other approaches to GUIs - while these thoughts may or may not have merit, they certainly do not help potential users decide on the quality of the project they are considering.
Though this library still needs a lot of work it's already quite powerful and has lots of potential to become a great GUI library.