OK sorry I got distracted last night, so didn't get the chance to play with it until now.
good things about Cloud Reader: fast and smooth page turning. can change reading direction with a simple button (the manga i'm reading goes from right to left). free and it supports zip.
bad things: i added a bunch of rar files in iTunes but Cloud Reader can't read them (more on this later), so i deleted them in iTunes, but the files remain in my bookshelf. so i have to delete them manually in Cloud Reader. Very annoying!
So the reason why the rar files won't read is because there is a folder inside the rar container (i.e. the person who did this put the jpeg into a folder, and rar the folder), and apparently Cloud Reader doesn't like it. I did a test and extract the rar file, and zip only the folder that contains the jpeg, and it reads fine. however i put the same "problematic" rar file under CRM and it handles it just fine, so CRM is more robust in that regard.
overall Cloud Reader has potential, but i hope the dev can fix the two bad things in the future release soon.
Yeah .rar was just supported so there might be bugs with it. did it just not read it or did it crash?
I still havent tried all my .rar's i will check on that.