Few days ago I started using external USB keyboard thanks to Developers of hostmode.
There is one thing that has been bugging me: after entering any text I have to wait few hundreds of milliseconds before pressing return. Otherwise this key will be missed/ignored.
I know, it sounds like a silly problem, but it's very annoying.
I'm using h-e-n and extkbd.
I'm sorry for typos, English is not my first language.