For shorter stuff I'm using the voice-to-text. Works pretty well, but probably not 100+ wpm.
Picked up a couple gently used folding Stowaway Universal Bluetooth Keyboards (Think Outside) from eBay. Keyboard is a little smaller than I'd like, but I'm not typing a novel, so I can live with it.
Pairing a bit goofy at first, but no problem at all.
Keyboard works fine. If you're looking, this model works well.