I use an OLD HP laptop and a Kindle Fire for pdf's at games.
The old laptop frequently delays the game while I set up files, especially if it decides to finish an update because reasons (and I forget to start it on the morning of game day to let it get all that out of its system). Not the best, but once the files are up it works. And because it is old, and the files are on a portable hard drive, it doesn't matter if I accidentally drop the thing.
The Kindle Fire works better OUT of Kindle mode, but does not work as well as the laptop. BUT, I can pull up rules - or the Central Supply Catalogue - during a game to let players review or shop without interrupting my tabs or exposing the spreadsheet the adventure notes are on.
Basically a NO recommendation for those two.