I use with my cell phone to watch movies. It works well. Cheap entertainment big screen and fits nicely in suit case. So entertainment anywhere I have cell coverage. You too can cut the cable!
The magnifier worked a sheet at a time but was too heavy and too bulky to work for reading a book or a news paper. You could only read with it while sitting at a table to support the book or paper. A lighter sheet the size of a standard book page or one more easily held would be better.