It's worked perfectly for me. the only shortfall has been i've had problems with DoD connecting to servers.
some of you may notice in irc (#steam-talk or #steam-hangout) that Almost all of Steam's problems can be attributed to lack of available bandwidth.
FYI: The Nexon and XS4All content servers are private servers for the respective companies' customers. -- UMKC:15051/20689 kbps RoadRunner:2092/369 kbps
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