1) It is nearly silent but you can hear the fan at all times and definitley hear the disk copying a file to it. 2) Wireless performance is definitely slower than airport extreme. 3) Wired performance sucks and this is why it is going back to the store. Wired performance in the range of 2-3Mbps whereas my NAS throughput is 17Mbps for the same file. It appears that the Time Capsule is pausing every couple of seconds where throughput drops to zero for a second or so and then continues. This was repeatable every time (Does on Wired Gigabit or wireless). I cannot believe noone has reported this. Or is this unit defective? I exchanged the defective unit and performance on the unit is much better. 2) Transferring the combo update for 10.5.2 yields 15-16 Mbps 3) Same over wireless is about 6.5 Mbps The pauses no longer exist on this one. The last one must have bad sectors on the disk or something. Apple swapped it on sight in the store no questions asked.