I recently bought two TBS 6904 Quad cards and am very happy with them.
I tried DVB Dream latest version but it crashed a lot so changed to DVB Dream 2.6 Version and that works well. Still using the test version.
However I found a free software which is much better EBS PRO. Ignore if windows say's it has malware its a false positive.
EBS detects the card and it gives much more information about the satellite channel scanned. The TS stream recorder is also great.
I did have some problem with a multi-switch but it was a switch issue and not the card. All sorted.
I only use the card to record the TS streams but they are very good.