UI with minimalism, open source and cross-platform (Win, Lin, Mac) -- what's not to like about it?! And a great name too. Kavita means poem or poetry in Sanskrit and pretty much all Indic languages. I'm sure others will point out the pros/cons vis-a-vis Calibre reader. But each serves a different niche. This one seems particularly geared towards comics. So cannot expect all the bells and whistles of Calibre.
Thanks for posting this. They don't seem to have that in their FAQs, and I find that's a very common thing. I often wonder about the naming of a project, and too often it's far too hard to find out. (In this case, it is simple enough to google "kavita meaning" and find out, but I feel like I find myself unable to find out for lots of projects)