I had the Keys to go but ended up returning it a couple days later. I liked the thin and light form factor but it was waaay too expensive. Also, the way the keys take some getting used to...they're not very raised at all and it makes it harder to tell what keys you're hitting. They don't have a very tactile feel to them and they take more effort to press down so I was often missing some letters from things I was typing.
I ended up going with this Anker keyboard
from Amazon which is $44 cheaper ($25.99) than the Keys To Go. It feels more like a normal keyboard, has a 6 month battery life, and comes with an 18 month warranty while still being compact and portable.
I also have this Anker keyboard
which I've also been using for almost a couple years now. It's even more portable than the one above, has a long battery life, is made out of aluminum, and is super super thin and compact....for $19 on Amazon.
If money isn't an issue, you may be fine with the Keys To Go, but honestly those two Anker keyboards are at least 45 bucks cheaper than the Keys To Go and do the same thing but better. I honestly think $70 for a keyboard is nuts, but that's just me.