Well, it does have the advantage of being actively maintained. If not necessarily very well. Recently, I had the fun of noting that their app was no longer behaving correctly with endnote links, and they suggested that my links were coded wrong. I pointed out that they were not, were standards-compliant and worked fine in every other epub reader I had. Even ADE! So I don't know what they were trying to do.
I had to script an install of ADE recently and apparently the only way to successfully silent install it is to create a registry key that pretends Norton 360 is installed, because their installer has a Norton Security Scan thing injected in which their silent flag doesn't handle.
