also read this: https://forums.macrumors.com/threads/586937/
could give you some ideas, read some opinions.
If you know how to type without looking at the keyboard, it's worthless.
Absolutely not. Do you know what's worth $400? Four $100 dollar bills - that you can use to spur the economy elsewhere.
I can type just fine without looking at the keyboard but it's still nice to have because of the function keys.