I like the app in that it is makes it easy (mostly) to read manga on my iPad, and it gets the job done adequately. I would recommend it.
But I do have a lot of gripes. My biggest complaint is that the app gets hung up a lot on resuming. Ill leave the app and comeback later to read some more but will get one of several errors either immediately upon resuming or shortly after it tries to download more content. Ill have to force close the app and relaunch. This is a near daily event.
Worse it will occasionally apparently corrupt its local cache and not be able to recover at all. I have to delete and reinstall the app when this happens. Fortunately this is only once every few weeks.
Those are my main gripes, but others include the fact that the "guide" will skip cells or occasionally whole pages, rendering that feature a non-starter for me. I dont get notifications when new content is available despite having turned the option on. And it is overly difficult to go back a page if it is to the previous chapter.
There are a lot of other little annoying things, but Ill stop there because despite all its shortcomings I still enjoy using it daily and encourage you to give it a try. I just wish they would work on fixing some of these bugs because the potential is there for it to be so much better and less frustrating.