I'm new to Sleepio and am on week one at the moment so I'm just filling in the diary at the moment. I struggle to remember how long it took me to fall asleep and if I wake during the night or not. I've seen the new blog post about the Up wristband. I was wondering how good this sort of technology is? I haven't seen it before and I'm curious to how accurate it is. It's a lot of money to spend if I do decide to get one, especially as I'm really only interested in the sleep part of it.