Summary: Works great once you figure out that you need more software and then find where to download that software. One of the downloads is from the Keyspan site and is an upgrade of the software that comes with the device.
Pros: Allows one to use old Stylewriter printer or other serial device with MiniDin8 serial connectors to work on newer Mac computers and operating systems.
Cons: Need to download hard to find software (drivers) so that it will work with OSX. Need to upgrade included software so it will work with OSX.