A couple of $ since it has only PDF-support and the loading of the files is cumbersome and annoying. It's more useful in an enterprise (a service-oriented one, with lots of documents on PDF), although many such enterprises use more flexible alternatives.
An iPad Pro or a similar thin tablet is much more useful. The only downside is the battery duration.
Since it's not an eBook reader I wonder what the heck are doing these threads here
