2 of 2 people found the following review helpful
Ethernet communication and SD read works reliably,
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This review is from: Ethernet Shield W5100 for Arduino Main board 2009 UNO
This was one of the quickest deliveries I have received from China. Board looks well-constructed; solder joints are neat. Have not yet tested SD function, but Ethernet communication is reliable. The board has been powered up for over a week now with no issues.
Update: Have now had this connected to the web for nearly two months now and have only had to reset once. I am using it for remote control of a home automation system. I have now used the SD function as a file server and have had no (programmer unrelated ;) issues, but still early days.