Hi,
for a complex review it is quite early, but I see 902 as a good reader for manga. The size big enough even for two side panels, and it feels almost like on paper
Loading speed is about 1 sec = OK.
The only problem I found is how to efficiently navigate between chapters
I didn't find way how to navigate from folder (one level up the hierarchy) but keeping the cursor (selection) on the folder I was previously inside. It moves selection on the 'parent folder' link. Which is a bit inconvenient (having manga/volume/chapter hierarchy)
Pictures are from One Piece (Mangastream scanlation)