Hi Sarah,

We just got a subscription.  So far, both teachers and students use it. I was able to obtain and upload an excel spreadsheet from our secretary that is in charge of enrollment that contains their Google credentials.  I manually enter the credentials of any new incoming students.  The process was easy enough (support was very helpful) and the platform is user friendly.  What I like about it is that it has unlimited simultaneous users.  The books change periodically and notifies the reader of it's last date of availability (and are replaced with new ones).  Having their own accounts allows readers to highlight and annotate the ebook, which is helpful to both teachers and students.  It also comes with an automatic generic login for users as well, so technically you would not have to upload users, but they don't get the customized reading experience like they would if they were signed with their own accounts.  You can probably ask for a trial before deciding on it if you contact them.  Let me know if you need contact info.