Great keyboard - charge lasts ages and uses standard USB connector. Very good to type on, All mac keys present (no £ sign but not an issue) I would give it 5 stars but ....
It goes to sleep within 5 mins, and then takes up to 8 seconds to switch back on again - other times between 1 and 5, but most of the time 8. It's far too long, and very very frustrating - especially when on the phone to someone and you need to look something up. Holding down the enter key seems to wake it up the quickest, but you may affect whatever is on the screen.
There is no way to keep the keyboard on, no way to adjust the timeouts - It's simply a right pain. You will get used to it, and if you are constantly typing something it is fine - but who browses the web and constantly types? We all occasionally use the keyboard when browsing the web - you will have to wake the damn thing up and wait far too long to start typing again, and it will always miss the first keystroke that awakens it.
Such a shame, as everything else about this keyboard is very good. Good as an occasional use keyboard but not full time. Have given in to the apple bluetooth keyboard as I can't bear the frustration of using this one ... and the Apple keyboard needs a constant supply of AA batteries which I wanted to avoid.