I note two serious issues related to the Kobo reader and associated software.
1 Using the desktop application, it is impossible to download only the new books you purchased. When you sync, all purchases (new and past) are downloaded and added to "My reading". Also i'm reading a series of books by the same author which includes one map in each book. The maps are not reproduced. Kobo support told me to use Adobe Digital Editions (ADE) instead. The desktop app in my estimation is useless.
2. Using ADE, I found that the "Notes" in the book, which were in a smaller font than the rest of the book were reproduced so that the font was too small to read. Nor did I find the full paragragh justification pleasing. But, at least, the maps are reproduced.
There are ways around the sync issue such as deleting past books from by library on kobobooks.com so they do not sync but I want to read books, not manage poorly executed software.