edulopez wrote:
I was thinking of buying the Thor by Simonson omnibus, but it must be really uncomfortable to read.
Depends on how you read it.  The size doesn't make it inherently uncomfortable to read, it just limits how you can comfortably read it.  If you're going to read it sitting in a chair holding it in front of you, then yes, it will be really uncomfortable.  Or if you read it on the train on your way to work, then yes, it will be really uncomfortable.  If you don't want to read the book with it laying flat on something in front of you, then you'll probably find it uncomfortable to read. 

Personally it's not as unfomfortable to read as those Masterworks with the tight glued bindings or a hardcover with a lot of gutter loss.  There's no good way to read a book like that without it's "flaws" impacting my reading experience.