Performance of the D-Link Cardbus was really good. While it may never reach the maximum speed of 108Mbps we were able to measure nearly 40 Mbps transfer speed when standing 5 feet from the DI-624 router. Moving 50 feet away reduced the transfer speed to about 20 Mbps but that is still blazing fast for a wireless setup. We were able to travel almost 200 feet away from the wireless router before we lost the signal. Overall, we have no complaints about performance. This is the fastest Cardbus we have ever tested.