I normally turn it on and keep it on all day. I do turn it off when I recharge at night. I initially had a couple of quirks with the sleep mode, but I discovered that if I lock the screen out first and wait about 2 seconds to make sure the lock function is actually complete, I can close the eDGe and it "wakes" up perfectly fine every time. For the last few months of putting it to sleep, I haven't had any problems with it waking up.