i would rather download them
i prefer downloading. so i don't have to be online when i want to read again - and i can read at full screen (don't know if some websites have an option like that) !
Your post sounds like a subtle ad for this online viewer, but since it has an actual topic, it isn't total spam and I'll leave it open.
In the future, you can advertise online viewers / manga download sites in the following designated topic.