Currently Being ModeratedNov 21, 2012 1:35 AM (in response to od90125)
Nope. You can even leave it plugged into your MBP and just let your MBP 'sleep' when you do.
No harm in leaving it plugged in even if it's not plugged into your computer, no harm in letting it stay plugged into your computer. No need to shutdown every day - just let your computer sleep...
Currently Being ModeratedNov 21, 2012 2:31 AM (in response to od90125)
As with any transformer, there would be some residual power usage by the device if left plugged in, so there would be a marginal cost saving in unplugging it. It also reduces the risk of damage from a power surge or lightning strike. However, I leave mine plugged in, and connected to the laptop, all the time.