Someone mentioned back in 2012 on another review that navigation between pages worked with the arrow keys, but I find this to not be the case (I’m using El Capitan, and I fail to see anywhere in this app’s or the system’s preferences to change this at this time). As it is, without a touchscreen, you need a mouse and clicking arrows to move back and forth between pages. Also, there is a lack of editing to change titles, or update missing information. I’m stuck with 1, 10-19, then on to comic 2 in one of my comic series and it makes things difficult to keep track of.
However, for a free app, it isn’t bad. It has no trouble displaying/zooming when needed, and visually displaying the comics helps a lot. There is plenty of room for improvement, but seeing that this app hasn’t been updated since Jan 2011, I won’t get my hopes up on these improvements happening.