Pros: If you are running a Mac, and you happen to be doing vinyl plotter work, with a plotter that isn't over $5000 and has it's own USB plotter drivers, then this adapter is for you. I've now used this exact adapter on 4 separate set-ups. From Chinese import plotters to a GraphTec. This is the only USB to Serial Adapter that will work consistently. I've tried going with the less expensive models, only to be left frustrated and still with a non-working plotter.

Cons: The price is high, especially if you just bought an import plotter, chances are that you have vinyl to cut, no extra budget or days to wait for another device before you can get started. Been there, and it sucks. So I will now never be left without one of these. Hopefully they continue to make them for years to come.

Overall Review: I've heard this also works with Mac to Laser Cutters as well. I haven't had the opportunity to try that, but when the time comes you can bet that me and my KeySpan USB to Serial Adapter will be right there in the trenches. Proving that Macs can be viable workplace machines that can actually output tangible and profitable objects, and not just a designer's choice.