Sometimes the file transfer doesn't work exactly right due to a loose cable connection, and some of the work is lost. Fast computers require different Alpha Smart transfer settings. DreamWriters have lots of options for saving and printing work, allowing even more opportunity for errors. The biggest problem we've had is dealing with the poor student who has managed to lose a whole night's work. We also like the portability but have to deal with batteries not being charged.
Laptop computers are expensive.
Though the price is, of course, the number one issue, the portability and durability of these word processing devices are also major reasons why one might choose them over a regular laptop computer. The issue of 2 pounds versus 7 pounds is definitely the deciding factor for us when we are running all over a convention center. Teachers who don't have computer at home could certainly profit by having a DreamWriter or Alpha Smart to take home each day to complete word-processing tasks. It is difficult to have a whole class complete a project in one class period. Downloading and printing become overwhelming when 30 students are trying to do this on only one or two computers and printers.