After reading this article I cannot help but assuming the author has a limited knowledge of DSD or complete lack of understanding of how it functions.
The DSD 150 identifies the Workstation by its MAC address. This is provided automatically when the thin client is installed and provided you do not change your network card the DSD knows and identifies your Workstation because of the. Therefore the statement
Re-authenticate" establishes a connection between the client PC and the DSD-150 on your LAN. You need to re-authenticate a client after you power cycle the DSD-150 or if you've unplugged your PC or if you've changed the settings in the DSD-150 menus.
Is totally false.

Re-authentication is only required IF you change the network card in the Workstation.

Other issues in respect to statements of
With a 1.9 MB download, it seemed like my Mac gained anti-virus, intrusion detection, and firewall functionality. That's a lot of functionality for a 1.9 MB! But as I learned while getting to know the DSD-150, the real anti-virus protection is provided by a 10 MB SophosAV antivirus update downloaded in the background (i.e., whenever the client authenticates with the DSD-150).

This statement is totally incorrect. Once the thin client is downloaded the only transfer of file information are daily updates to virus definitions which takes less than 1 minute.

The DSD IS NOT in constant communication with the thin client.

My assumption of the reviewers issues with applications NOT functioning is probably as a result in incorrectly configuring the firewall in the DSD not the thin client. The firewall within the DSD works like any other Hardware firewall, however is is easily configured by user type profiles like 'gaming' and allows the user to open ports that are normally closed if you select High Security, to run IRC applications and Games. Most of the well known issue applications like all of the Messenger type applications are named and also games that require traditionally ports that are normally closed.

For example in setting up Firewall component for the first time and you choose High Security there is an exception tab which list MSN, Yahoo Messenger with Voice etc and Popular file sharing applications for downloading MP3's and you tick what additional or exceptions you need if you want both high security and also exceptions.

The thin client will alerts to allow application access by the firewall that is apart, however inherited from the initial Hardware settings. However if you have configured the hardware firewall for High security and you want to use Yahoo Messenger with voice the thin client will not change nor is it meant to change the Hardware Firewall.

In conclusion it is my opinion that the reviewer is trying to work out how the unit works rather than read the manual first, configure the DSD unit, then configure the thin clients.

This unit is meant to be easy and it is. It is created for a non-technical user, yet possesses high performance which a technical user can utilise.

My advise to anyone is RTFM. Read the installation manual. Dont try to work out how it technically works - users primarily dont care - they just want it to work.

This unit does just that. It works and it is easy to configure IF you follow the manual and dont try to analyse how as your attempts to fix up your mistakes you make if you dont follow the install guide.

It does not use anywhere near the resources of a Workstation of the combined functionality of separate you would need to add together to provide what the DSD does. You dont get anything for nothing, however the DSD does not slow a PC down anywhere near the extent of an equal totally software solution based application.