StarTech isn't to be blamed for any DCC shortcomings, this is a Microsoft application. It's definitely a poor man's networking solution. It's too slow to be used for much more than modem sharing. File transfers can be done if one is patient and the files are small enough. The serial port connection does have the added benefit of allowing multi-player games.
Most games now have the option of playing others through a modem or an Internet site.
The serial connection is fast enough to make games work well and without the latency problems found on Internet sites. My kids and their friends are having great time with this feature. Next it was time to install StarTech's Internet Sharing software. That's when I found out that it was registerware. Purchasing the software isn't good enough.