I bought a MyNet 750 and was disappointed.
The USB transfer speed was average (10MB/s) on larger files, but on small files it crashed (200-500kB/s). After the first week I started seeing random loss of internet connection on both the gigabit wired, and the wireless service. I didn't see anything in the log files to help diagnose and decided that I didn't have the energy to fight with it.
I exchanged for a Cisco EA-4500 and couldn't be happier (better range, faster USB speeds, and stable connection so far).
Ben