Seems like the only way to return feedback...
Wow... this has to be the most unpleasant customer experience in online purchasing that I have EVER had. Here is my experience.
I had a Que reference book, "Scott Mueller's Upgrading and Repairing Networks", on my shelf that I purchased awhile ago. I hadn't used it until today. I consulted the index of this very large (1178 pages), paperback book, found my item, and went to that page. The book's spine broke. So, I decided to see if there was a digital edition, an ebook. As I now have an iPad in addition to my Mac desktop and Toshiba laptop computers, I often refer to my ebooks.
I found that Que had an Adobe Digital Edition ebook for purchase. The price was reasonable enough. I assumed the ebook probably had some sort of watermark as other publishers do, so I decided to buy. The purchase completed and I saw a small (1.4k) 'acsm' file downloaded with another '0eYxtNTq.html.part' file in my downloads folder. This usually indicates an interrupted download. I tried again with the same result. Odd. Double clicking the 'acsm' file asked for an application. Returning to the download page, I found I needed to get an Adobe Digital Editions application. The download page showed I would be getting a PDF and I already had Adobe Reader but did so, as instructed.
After downloading and installing the new application, I found that I needed to register with my Adobe ID. Not finding one in my 1Password account archive, I tried to setup a new account but found I had an existing account. So, I completed the password reset routine. Viewing my account information, I found I could not update my country. I am no longer in the U.S., I am in Australia. I could create a new account with the same Adobe ID. I did so. Odd.
In the Adobe Digital Editions application, I tried to find a way to add the new ebook. The interface is confusing. It appeared that "Library > Add Item to Library" allowed me to navigate to the folder holding the 'acsm' file, but it was greyed out. I returned to my desktop and double-clicked the 'acsm' file and it switched to the Adobe Digital Editions application and began downloading the file. It completed successfully.
Once I had the file in the application, I saw it displayed in the usual unreadable single, full page format. In Adobe Reader, Cmd-2 activates the fit-to-width display. That did not work. I had to use my mouse to go to the toolbar, select "Reading > Fit to Width" to get my desired reading format.
I knew I wanted to go to page 362. In Adobe Reader that is Cmd-Sft-N to bring up the "Go to Page" field. Did not work. I selected "Reading > Go to Page". I saw no entry field. After scanning the interface, I saw that a small box in the upper right was highlighted. There was some text in the box but I found if I cleared it and entered the page number and hit Enter, I would see the desired page displayed.
That was a lot of work to simply read a reference entry in an ebook. For comparison, I do NOT have such issues with O'Reilly books, Take Control books, Packt Publishing books, Site Point books, and probably a number of other publisher ebooks I have. I don't see any advantage to me as a customer. (Thank heavens I see I can copy and paste to construct my own notes. No right-click context menu 'Copy' command though; I have to drag up to the 'Reading' menu again.)
The entire experience speaks of coercion and is crippled in my opinion. I cannot recommend it to others. In fact, I will actively wave-off others if they find Adobe Digital Editions is one of their options.
Apple removed its crippled protection from iTunes music. Site Point and Packt Publishing removed their onerous protection from their ebooks. Here is hoping you find similar enlightenment.