Best programs and devices for testing

[angelFrog]

I'm gradually coming to realize how much variance there can be in the way various ebook readers and devices translate/display epub and mobi files, and I'm wondering what programs and devices I should test my ebooks on to be reasonably certain that they look as expected for as many readers as possible.

My biggest question is concerning Kindle Previewer. Is it sufficient to test mobi files on that, or are there problems that can occur on specific devices that the Previewer won't reveal? Are there older generation Kindles that would be useful to own for testing purposes?

On the epub front, I currently test with the iBooks and Kobo apps on the iPad, Adobe Digital Editions, and my Kobo Glo. Is there much point in verifying books with the various Mac/PC readers for Kobo, Nook and Sony? Is it worthwhile to pick up a Nook or a Sony eReader?

To be safe and OCD I could buy one of every major eReading device out there… but that's probably overkill

Lots of questions, I know. Thanks in advance for any pointers!

[Julius Caesar]

Kindle Previewer can not show how TOC would look like from the Go To menu.

[angelFrog]

Originally Posted by Julius Caesar

Kindle Previewer can not show how TOC would look like from the Go To menu.

That's interesting. I wonder if there's anything that can go wrong there, aside from what I might notice in the basic TOC in the Previewer.

[Julius Caesar]

Originally Posted by angelFrog

That's interesting. I wonder if there's anything that can go wrong there, aside from what I might notice in the basic TOC in the Previewer.

One more thing. I don't think you can search for a keyword with Kindle Paperwhite Previewer. I don't know about other devices.