It's good that you confirmed that it was not the same card as mentioned in the top post.

Anyway, I have the UC300 and I am very happy with that. It is made in Hungary and the support is very good. It was really almost a "plug-and-play" installation, very straight forward and simple. It works very well and I love the many options and external inputs/outputs it has. Very flexible and reliable.

Previously I bought another USB driver, which was supposed to support Mach3 as well, and there is a plugin for it on the Mach3 site, but it flipped out more than once (CNC axis run away uncontrolled when I started the vacuum cleaner or lit a florescent lamp in the same room) ruined more than one work piece before I brutally stopped the machine by a power off emergency stop, so I had to replace that. Even probing was useless, the code G31 did nothing and some crucial WB macros were also not supported, so basically that was a bad experience, cost me over 100 USD. I used the card on another computer as a sort of "CNC simulator" but after I updated my computers to Windows 10 I had to bin it since the driver is not Windows 10 compatible. The UC300 works well even with Win10 Pro. So, whatever you buy, make sure it supports not only Mach3, but also all the G-codes and WB macros and that it works under Win10.