AccessTUNER

If you have device (PC, Notebook or sth.) with USB and Windows 8 system, and you want to install AccessTUNER Race software for your COBB AccessPORT, the installer may not be able to find your device. This is because there is not appropriate driver installed for AccessPORT. But this is a workaround: you need to install AccessPORT Manager first, and then get a driver from AccessPORT Manager directory. I found a site where this is described step by step with screenshots, here you are:

COBB is proud to announce the immediate availability of the 2013 USDM MAZDASPEED3 AccessPORT support! In addition to 2013 US models, we’ve also added Mexican and Japanese MAZDASPEED/Axela/MPS ROM support so more people can enjoy the simple plug and play power of the AccessPORT.

On October 2, 2012 COBB Tuning announced that AccessPORT will support European versions of turbocharged Mazda 3 and 6 vehicles. This is very good news for Mazda3 MPS and Mazda6 MPS owners, because from this day they can tune their cars using AccessPORT predefined maps and use many features delivered by AccessPORT, like monitoring, logging and so on.
Below is note from COBB Blogs:

On May 14, 2012 COBB Tuning announced that AccessPORT is now available for Australian Mazda3 MPS and Mazda 6 MPS. Below is note from their site:

Why tune a car that has a FWD and 260 HP under the hood? The answer is simple: because you can;)
So, after reading several reviews and consultation with colleagues, I decided to buy AccessPORT from COBB Tuning. COBB company is well known especially in the U.S. market, because sells hardware and software to improve performance of some Japanese and German car brands put on the U.S. market.