I have more than 2+ years of experience in eBook conversion. I have helped a lot of customers in various tasks.
Converting your manuscript to all different eBook formats including:---
1. Regular Layout eBooks, Fixed Layout eBook, Read Aloud eBook & TextBook for iPad using HTML5 + CSS3, Audio and Video embedded in eBooks.
2. Regular Kindle, Kindle Fixed Layout, Kindle Popup eBooks, Comic eBooks.
Before sending files to client, I always test files in devices like... iPad/Kindle Fire/Sony Reader/Nook Reader.