Have one.. use it.. no real problem, what they discuss in troubleshooting is that other devices like other AP's, microwaves, pa systems, cordless phones etc, can cause interference. A real hassle when you are in town doing a presentation...
You may be misinterpreting one thing they do. (i'll try and make it understandable rather than technically correct). They use the idea of input and output memory buffers. If stuff is in the input buffer, it can be copied to disk/sent to another device/xferred to the output buffer etc. Another routine looks at the output buffer and send it to devices/disk/a third device etc. Most devices use that idea, buffer in - buffer out, it is usually just done so fast, you don't know it's happening and think it is direct connect.