Faster than other Class 4 cards ...

Among other things, in a Sony A230L, Lumix TZ10, Canon SX200, Sony HX5V, Samsung NX5, Nikon S8000 and Nikon D3100.
In none of the camera model, there were problems or malfunctions.

The compatibility seems to be very good.

Since I have several cameras at home, I bought other SDHC Class 4 cards (Sandisk).

It is noticeable that the Sony is much faster than the Sandisk.

Normally it is assumed that the same "class" classifications should be the same speed and - far from it!

Conclusion:

With the Sony one is on the safe side - good quality and high speeds.
Here one should (of course depending on the application) does not save at the wrong end.