Sandisc Extreme HD Video (without "pro", 30 MB/s, Class10), 16GB - got it at ebay for €34,50 - didn't want the 32GB version, too expensive if I loose it or whatever :-)

Another question: does anyone know, how to measure bitrates reliably? Because Quicktime gives other results than Gspot, than of course you can find it uot by dividing the filesize through time - but that's too annoying, I find...
Tried to install "videoinspector.exe", but during install my Avira found some virus or whatever...
Btw I also have a mac tool called Videospec, which seems to be completely unreliable or even garbage - in case anyone knows some reliable mac tool, apart from Quicktime, that'd be even better!

Hmm that can't be - unless there's different implementations of UHS-1, or something similar?
As I wrote, 180 Mbit was recorded ok (this 180 Mbit clip was only 5 seconds or so, but that should suffice as a proof I think?) - 180 Mbit = 22,5 MB/s. And since I didn't get any card error, it's quite probable, the cards can actually take the full 30 MB/s, exactly the way, Sandisc adverts them...

No, talking about my GH2. I was at first skeptical but when I tried it significantly reduced my lag. That red 'writing to the card' graphic is not around so long :-) Unless I'm dreaming. I'm quite picky with specs so I can definitely say that I see and feel the speed increase - was never too happy with the Transcend in the first place.

I have one. It outperforms my old Transcend Class 10. My lag time in writing full size RAW and full 24P has been cut in less than half. I'm very happy with it.