Dark Horses app is quite slow. It requires long loading times and has to download the shops content each time the app is opened, as well as the covers for the comics you have downloaded in your library. Its odd and time consuming.
The panel-by-panel reading is also pretty clunky, not nearly as smooth as Comixologys guided view. I wish there was a "view whole page" option after going through each panel on a page like there is on Comixology.
The prices are fair, though, and the catalog seems to have most (maybe all) of Dark Horses comics available for purchase. I do like their smaller bundles of four comics; Comixologys bundles are always an entire run or a collected edition, both of which are basically as expensive as buying individual issues.
I dont know why Dark Horse doesnt sell through Comixology, but I really wish they would. This app is awful in comparison, but I like the Mass Effect comics enough to deal with it, I suppose.
Fork_71 about Dark Horse Comics