Once you get the print server on your network & connect your DYMO LabelWriter, it should be smooth sailing. It should go without saying, but be sure to have the DYMO Label Software (or DYMO Connect for Desktop) already installed on any machine(s) you’ll be using the DYMO printer with.
I did want to point out a few things though. When you unbox the device, you'll find the MAC address listed on the bottom sticker. I would highly suggest creating a static IP for the print server via your router's management page (192.168.1.1 in my case), BEFORE connecting it to your network via Ethernet. Per the DYMO Print Server User Guide, by default, the static IP address for the print server is 192.168.1.100. Since that was already taken by another IP reservation on my network, I assigned 192.168.1.3 to my DYMO print server.
Once that was done, I connected the print server to my LabelWriter & to my router, and plugged in the A/C adapter. Less than a minute later, all of the status lights had activity & I was able to navigate to 192.168.1.3 to access the DYMO LabelWriter Print Server web configuration page. I really didn’t need to change any options here though, since setting the IP address is basically the bulk of the setup; I did modify the server Description field.
Do yourself a favor and search Google for “Dymo Print Server User Guide” — the first result is what you’re looking for — a PDF version of the setup guide. Avoid installing the Control Center software, as the same configuration can be done using the print server web UI (as outlined above). The only thing I used the guide for was to install the DYMO printer on my Windows machine(s), since the process was not as straightforward compared to Mac. Once on the network, the DYMO printer automatically shows up when you click on the + button on the Mac’s Printers & Scanners window — I just changed the Name & Location fields when adding it, for clarity. However, on Windows, the DYMO will not be automatically detected, and must be added manually, by following the steps listed under the “Adding a Printer in Windows Vista” section of the DYMO Print Server User Guide; the Vista instructions still work in Windows 10. This is where having a static IP comes in handy — you’ll be guaranteed that the DYMO Print Server will always have the same IP address, even after its DHCP lease expires. This ensures that your computers will always be able to “see” the printer on the network after it’s been added.
My server’s been up & running since day 1 with no issues; works with both my Mac & Windows machines. Docking 1 star, given the not-so-clear setup process, and the outrageous price. I’m mostly bummed about Windows not automatically detecting the print server during the install step, unlike Mac. But overall, it’s a set-it-and-forget-it kind of device.
TL;DR — Install the DYMO Label Software (or DYMO Connect for Desktop) on any machine(s) you’ll be using the DYMO printer with. Locate the MAC address of the DYMO LabelWriter Print Server (found on the bottom sticker of the device), and set a static IP address for the server on your network (doing this via your router, NOT the DYMO server itself, is preferable). Connect the DYMO LabelWriter Print Server to your DYMO printer via USB, to your router/modem via Ethernet, and connect the A/C adapter. Navigate to the DYMO LabelWriter Print Server web configuration page, using the IP address you just reserved — if it loads, it means it’s been set up correctly — you do not necessarily need to change any options here. By default, the Administrator is “admin” as is the Password; unless you’re on an Enterprise/office network, I wouldn’t suggest changing this. Follow the instructions in the Dymo Print Server User Guide to add/install the printer on your computer(s) — refer to “Adding a Printer in Windows Vista” if you’re using Windows 7 or 10.