First you have to know that there is no driver for any Mystique card. The card is actually the T9580 (DVB-T / T2 / C + S2). The driver for it can be found here:
[...] Dvbsky.net
First tested under Windows Vista if it works at all. And I had success. If the card is already installed you have the hardware manager for the device search, go there to reinstall drivers and to use the drivers from the above page. It is better just to install the driver and then install the card. Then you will be automatically asked where the driver is located. Using the supplied unmarked selbstgebrannt driver CD, I would not recommend.
Now for Linux:
Unfortunately, the map of V4L was not directly supported. You have to build your own and install the kernel modules. The drivers are "backported" applied, ie actually designed for an older kernel version - if I have understood correctly. But unfortunately I am not a programmer. Anyway, they just work fine if you use the kernel versions listed and also keeps strictly to the "step by step" instructions (see support page above). I could not see an impact on other hardware or software, however, is in front at the start already warned that you should not use in production environments, the modules. If the card is running, you have a super ability DVB-T and DVB-S or S2 and also to look T2 take. For me, the whole was quite good with Kaffeine. Also, the guide and the teletext function super.
For Linux beginner I would not recommend this card. Another disadvantage is that you have to recompile the modules for the new kernel after each kernel update, since they at least Ubuntu or Mint are not officially supported (yet). DKMS warns of kernel update also the modules must be manually reinstalled. Conclusion: Hardware is OK, installation is very complicated, cumbersome and somewhat time consuming (at least on Linux).