I have Both
There is NO lagtime, no delay. The mouse tracking seems to be slower, but it could just be me. Be warned, however: if you are using the peripherals with a D-Link adapter, make sure you install the wireless software first, THEN update the firmware. If you do not, the peripherals will not be able to wake the computer. This is not documented in the instructions. Also, the battery life Apple states is very optimistic. I have using my mouse, under normal home Mac use, and the new (batteries that came with Mouse) are alreadt half drained according to System Preferences. I don't regret getting it though, it's awesome, but just wanted to pass on my experiences.