The program is based on Adobe Air and its interface is pretty good and intuitive.
You'll have to register for free, so you can have all your comics perfectly organized. There are lots of comics and many of them are totally free.
You'll be able to preview the comics and decide whether to buy them or not. Read them and enjoy comics in a different way thanks to this great application.
Finally, all users can rate them, so you can view a ranking if you don't know which one to read today.